- Employ USES+=localbase:ldflags instead of manually setting CFLAGS
  and LDFLAGS
- Propagate our standard `prefix' and `mandir' to inner Makefile and
  thus get rid of hand-rolled `do-install' target
- Install `doc/standards.html' and convert to options helper target
- Simplify PLIST_FILES and sanitize port description text while here

TIMESTAMP (evilwm-1.1.1.tar.gz) = 1436791316