Create JI version
Fix sass version to make build as predictable as possible
Add 'onlyWhenNewer' and 'runInBackground' options
Add 'spawn' option
Merge branch 'master' into build-improvements

* master:
  clean up appendix from LICENSE file
  Fix for issue #47, ENV["GEM_PATH"] is not an array when set
  typo correction
  Updated README.md
[manual release] Release 1.1.1.JI.1
Next development version
Merge branch 'build-improvements'

* build-improvements:
  Next development version
  [manual release] Release 1.1.1.JI.1
  Add 'spawn' option
  Add 'onlyWhenNewer' and 'runInBackground' options
  Fix sass version to make build as predictable as possible
  Create JI version