add bundler binstubs to the .profile.d path
Merge pull request #146 from hone/jruby-passenger

set indy to false. Fixes #145.
Merge pull request #147 from hone/cache_assets

store the rails 4 asset cache to improve asset pipeline performance
restrict build rubies to mri 1.9.2 and 1.8.7
update changelog
Merge pull request #143 from heroku/add_binstubs_to_path

add bundler binstubs to the .profile.d path
v80
Setup a default bundler cache for ruby 2.0.0 (default ruby)