Fix lint warnings

Fixed warnings:
```md
app/scripts/controllers/computed-balances.js
+ 35:27  warning  Missing space before function parentheses            space-before-function-paren
+ 41:14  warning  'address' is never reassigned. Use 'const' instead   prefer-const
+ 61:9   warning  'updater' is never reassigned. Use 'const' instead   prefer-const
+ 68:11  warning  'newState' is never reassigned. Use 'const' instead  prefer-const

app/scripts/controllers/network.js
+ 104:29  warning  Missing space before function parentheses  space-before-function-paren

app/scripts/lib/createLoggerMiddleware.js
+ 4:32  warning  Missing space before function parentheses      space-before-function-paren
+ 15:2   warning  Newline required at end of file but not found  eol-last

app/scripts/lib/createOriginMiddleware.js
+ 4:32  warning  Missing space before function parentheses      space-before-function-paren
+ 9:2   warning  Newline required at end of file but not found  eol-last

app/scripts/lib/createProviderMiddleware.js
+ 5:34  warning  Missing space before function parentheses      space-before-function-paren
+ 13:2   warning  Newline required at end of file but not found  eol-last

app/scripts/lib/events-proxy.js
+ 1:50  warning  Missing space before function parentheses      space-before-function-paren
+ 31:2   warning  Newline required at end of file but not found  eol-last

app/scripts/lib/nodeify.js
+ 2:22  warning  Missing space before function parentheses  space-before-function-paren
+ 2:24  warning  Missing space before opening brace         space-before-blocks
+ 5:18  warning  Missing space before function parentheses  space-before-function-paren
+ 5:20  warning  Missing space before opening brace         space-before-blocks

app/scripts/lib/pending-balance-calculator.js
+ 16:19  warning  Missing space before function parentheses  space-before-function-paren

app/scripts/lib/pending-tx-tracker.js
+ 85:11  warning  '||' should be placed at the end of the line  operator-linebreak
+ 87:11  warning  '||' should be placed at the end of the line  operator-linebreak
+ 88:11  warning  '||' should be placed at the end of the line  operator-linebreak
+ 90:11  warning  '||' should be placed at the end of the line  operator-linebreak
+ 91:11  warning  '||' should be placed at the end of the line  operator-linebreak

app/scripts/lib/port-stream.js
+ 3:22  warning  Missing space before function parentheses  space-before-function-paren
+ 3:24  warning  Missing space before opening brace         space-before-blocks

app/scripts/lib/tx-gas-utils.js
+ 84:2  warning  Newline required at end of file but not found  eol-last

app/scripts/lib/tx-state-history-helper.js
+ 12:37  warning  Missing space before function parentheses      space-before-function-paren
+ 23:30  warning  Missing space before function parentheses      space-before-function-paren
+ 30:23  warning  Missing space before function parentheses      space-before-function-paren
+ 35:28  warning  Missing space before function parentheses      space-before-function-paren
+ 41:2   warning  Newline required at end of file but not found  eol-last

app/scripts/lib/tx-state-manager.js
+ 94:13  warning  'value' is never reassigned. Use 'const' instead  prefer-const

ui/app/reducers.js
+ 45:7  warning  'state' is never reassigned. Use 'const' instead        prefer-const
+ 53:7  warning  'stateString' is never reassigned. Use 'const' instead  prefer-const

ui/lib/tx-helper.js
+ 27:2  warning  Newline required at end of file but not found  eol-last

ui/app/components/account-dropdowns.js
+ 163:1  warning  More than 2 blank lines not allowed  no-multiple-empty-lines

ui/app/components/menu-droppo.js
+ 22:7  warning  'style' is never reassigned. Use 'const' instead  prefer-const

ui/app/components/shapeshift-form.js
+ 135:11  warning  '&&' should be placed at the end of the line  operator-linebreak

ui/app/components/typed-message-renderer.js
+ 35:25  warning  Missing space before function parentheses      space-before-function-paren
+ 42:2   warning  Newline required at end of file but not found  eol-last

mascara/server/index.js
+ 11:42  warning  Use path.join() or path.resolve() instead of + to create paths  no-path-concat
+ 12:36  warning  Use path.join() or path.resolve() instead of + to create paths  no-path-concat
+ 13:33  warning  Use path.join() or path.resolve() instead of + to create paths  no-path-concat
+ 14:40  warning  Use path.join() or path.resolve() instead of + to create paths  no-path-concat
+ 20:29  warning  Use path.join() or path.resolve() instead of + to create paths  no-path-concat
+ 21:29  warning  Use path.join() or path.resolve() instead of + to create paths  no-path-concat
+ 26:40  warning  Use path.join() or path.resolve() instead of + to create paths  no-path-concat
```

6 files changed, 9 insertions, 11 deletions

diff --git a/ui/app/components/account-dropdowns.js b/ui/app/components/account-dropdowns.js
index 1b46e532a..379e40da7 100644
--- a/ui/app/components/account-dropdowns.js
+++ b/ui/app/components/account-dropdowns.js
@@ -161,8 +161,6 @@ class AccountDropdowns extends Component {
     )
   }
 
-
-
   renderAccountOptions () {
     const { actions } = this.props
     const { optionsMenuActive } = this.state
diff --git a/ui/app/components/menu-droppo.js b/ui/app/components/menu-droppo.js
index 66ab18954..2f173544e 100644
--- a/ui/app/components/menu-droppo.js
+++ b/ui/app/components/menu-droppo.js
@@ -19,7 +19,7 @@ MenuDroppoComponent.prototype.render = function () {
 
   this.manageListeners()
 
-  let style = this.props.style || {}
+  const style = this.props.style || {}
   if (!('position' in style)) {
     style.position = 'fixed'
   }
diff --git a/ui/app/components/shapeshift-form.js b/ui/app/components/shapeshift-form.js
index 901a4a956..c5993e3d3 100644
--- a/ui/app/components/shapeshift-form.js
+++ b/ui/app/components/shapeshift-form.js
@@ -130,9 +130,9 @@ ShapeshiftForm.prototype.renderMain = function () {
         alignItems: 'flex-start',
       },
     }, [
-      this.props.warning
-        ? this.props.warning
-        && h('span.error.flex-center', {
+      this.props.warning ?
+        this.props.warning &&
+        h('span.error.flex-center', {
           style: {
             textAlign: 'center',
             width: '229px',
diff --git a/ui/app/components/typed-message-renderer.js b/ui/app/components/typed-message-renderer.js
index a042b57be..d170d63b7 100644
--- a/ui/app/components/typed-message-renderer.js
+++ b/ui/app/components/typed-message-renderer.js
@@ -32,11 +32,11 @@ TypedMessageRenderer.prototype.render = function () {
   )
 }
 
-function renderTypedData(values) {
+function renderTypedData (values) {
   return values.map(function (value) {
     return h('div', {}, [
       h('strong', {style: {display: 'block', fontWeight: 'bold'}}, String(value.name) + ':'),
       h('div', {}, value.value),
     ])
   })
-}
\ No newline at end of file
+}
diff --git a/ui/app/reducers.js b/ui/app/reducers.js
index 1cded7ca7..e1a890535 100644
--- a/ui/app/reducers.js
+++ b/ui/app/reducers.js
@@ -42,7 +42,7 @@ function rootReducer (state, action) {
 }
 
 window.logState = function () {
-  let state = window.METAMASK_CACHED_LOG_STATE
+  const state = window.METAMASK_CACHED_LOG_STATE
   let version
   try {
     version = global.platform.getVersion()
@@ -50,7 +50,7 @@ window.logState = function () {
     version = 'unable to load version.'
   }
   state.version = version
-  let stateString = JSON.stringify(state, removeSeedWords, 2)
+  const stateString = JSON.stringify(state, removeSeedWords, 2)
   return stateString
 }
 
diff --git a/ui/lib/tx-helper.js b/ui/lib/tx-helper.js
index 341567e2f..de3f00d2d 100644
--- a/ui/lib/tx-helper.js
+++ b/ui/lib/tx-helper.js
@@ -24,4 +24,4 @@ module.exports = function (unapprovedTxs, unapprovedMsgs, personalMsgs, typedMes
   })
 
   return allValues
-}
\ No newline at end of file
+}