Add a flag that can be used to clear the build cache
Add some feedback for the cache being cleared
Merge pull request #17 from rehno-lindeque/clear-cache

Add a flag that can be used to clear the buildpack cache
Document the CLEAR_BUILDPACK_CACHE option
Fix check for $CLEAR_BUILDCACHE_CACHE

Previously, it would just clear it no matter what.
Merge pull request #19 from jonsterling/master

Fix check for $CLEAR_BUILDCACHE_CACHE
Set default LANG to en_US.UTF-8

Sets en_US.UTF-8 following the pattern used by the Ruby and Python
buildpacks. Essentially, configure LANG default for the build, and
in the profile which creates the default context for the running
application.

References:

* Python buildpack language encoding:  https://github.com/heroku/heroku-buildpack-python/blob/566f7f4555dcde26252a0db01f6bd28f6bb00494/bin/compile#L84
* Ruby buildpack language encoding: https://github.com/heroku/heroku-buildpack-ruby/blob/2eb97fcbf5e369800596ba6b070fde0ef17c59e9/lib/language_pack/ruby.rb#L60
Merge pull request #22 from jsl/set_encoding_in_release

Set default LANG to en_US.UTF-8
Merge branch 'master' of github.com:begriffs/heroku-buildpack-ghc into prebuilt-library

Conflicts:
	bin/compile