Explictly sets the prefix when building node
Cache fetched bundler and parsed bundle.
init
Realize the bundle if bundler_path is called before bundle.
Really just one instance of things.
Less magic.
Merge branch 'master' into cache-parsed-bundle
Create database_yml again to make it work with rails 4.0.0.rc.  Refer to: https://github.com/rails/rails/commit/dd5a80dc3da794f9296ec199c492a398589257a0.
Show full backtrace on exceptions

From conversation https://github.com/grosser/parallel_tests/issues/221
warn when ruby version is not set in the Gemfile
Test raise error for sqlite3
Merge pull request #93 from siong1987/rails4

Create database.yml again to make it work with rails 4.0.0.rc.
Merge pull request #104 from heroku/schneems/sqlite3-warning

Raise error on sqlite3 gem inclusion
make ruby 2.0.0 the default ruby
check for the proper binstubs for Rails 4
rails 4 does not support _VERSION_ on bundle binstub
clean and cache the finalized rails 4 assets
don't print out rails plugin injection if we aren't injecting anything
warn if missing gems for Rails 4
arrow the warning