Don't start the server when compiling
Various improvements.

* message() function helper
* Install the same versions of Liquid and Jekyll that GitHub uses
* Set UTF8 $LC_ALL when compiling and releasing to fix "invalid byte
  sequence in US-ASCII" error
Merge pull request #3 from gabebw/master

Various improvements
Merge branch 'master' of git://github.com/markpundsack/heroku-buildpack-jekyll

Conflicts:
	bin/compile