AMD Compatibility to templates - Adds Config options: use_amd and handlebars_amd_path
Cleanup
First pass at documentation
Usage documentation
Register template handlers very early on. Fixes #70.
Merge remote-tracking branch 'leshill/master'
ruby-version
Require sprockets first no matter what.
rvm to ruby-version
merge leshill/master
merge amd branch
Merge remote-tracking branch 'customink/early_registery'

Conflicts:
	lib/handlebars_assets/engine.rb
Oops local variables.