add Tower.app icon
add unused variable linting
add grunt jshint
add support for Grunt's file pattern matching

process matches which are directories. files to follow. refs #9
add support for Grunt's file pattern matching

process matches which are directories. files to follow. refs #9
remove debug code
add check for deprecated config and help developers migrate.

refs #9
update configuration examples
add support for piping stdin into imageOptim

refs #9, #15
remove local test config
refactor gathering cli options
DRY file/directory processing
README
Merge branch 'develop'

* develop:
  README
  DRY file/directory processing
  refactor gathering cli options
  remove local test config
  add support for piping stdin into imageOptim
  update configuration examples
  add check for deprecated config and help developers migrate.
  add support for Grunt's file pattern matching
  add support for Grunt's file pattern matching
  add grunt jshint
  add unused variable linting
  add Tower.app icon
edit configuration change message
1.4.0