- Update to 05_20140817

  Changelog:

  * The chapter about files in the manual has been improved.
  * Variants of the for-each-loop with an until condition have been
    added to array.s7i.
  * The parse operator for characters has been improved to accept only
    strings with a length of 1.
  * The function trimValue has been introduced. This function trims a
    string such that it can be converted to a specified type.
  * The exception handlers for RANGE_ERROR have been removed from the
    functions read and readln in enable_input.s7i. The functions read
    and readln now raise range RANGE_ERROR when the conversion to the
    target type fails.
  * Occurances of io_ok, io_error, io_empty and io_filled have been
    removed from the libraries. This undocumented feature was not used
    for years. The function succeeds and the functions read and readln
    with default value are better suited for error checking, when data
    is read.
  * The exception handlers in interpreter and compiler have been
    improved to allow an otherwise part.
  * The function succeeds has been introduced. This function executes
    a statement and returns TRUE when no exception occurs.
  * The example programs nicoma.sd7 and savehd7.sd7 have been improved
    to use the new function succeeds.
  * The parse operator for float has been changed to raise RANGE_ERROR
    when leading whitespace is found.
  * The library make.s7i has been improved to accept the commands
    erase, xcopy, mv, move and rem.
  * The library makedata.s7i has been improved to accept the macro
    functions subst and patsubst.
  * The reading of rules in makedata.s7i has been improved to read
    commands without macro substitution. The macros in commands are
    substituted just before the commands are executed.
  * The make functions in make.s7i have been changed to raise
    FILE_ERROR when a command fails.
  * The function applyMacros in makedata.s7i has been improved to
    accept macro functions and the shorthands of patsubst.
  * The function replaceSuffixes in makedata.s7i has been improved to
    accept pattern substitution with the % character.
  * In the library make.s7i the logging has been removed from the
    functions doRm, doCp, doPwd, doEcho, doCd, doMake, doOneCommand,
    doCommands and processCommand.
  * The program chkflt.sd7 has been adjusted to work with the strict
    parse operator for float.
  * Interpreter and compiler have been improved to support the actions
    PRC_BLOCK_CATCH_ALL and PRC_BLOCK_OTHERWISE.
  * The program sudo.c has been improved to work without upper limit
    for the parameter length.
  * The functions checkIfOutsideRange and negate have been added to
    int_act.s7i.

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