Install foreman
Update builder

Don't use foreman if no Procfile was found
Merge branch 'master' into foreman

* master:
  overwrite source.list
  change repo before prepare task
  Fix for deprecated repository
Merge branch 'master' into foreman
Merge branch 'master' into foreman
Merge branch 'master' into foreman
Revert back to Ubuntu 12.04, because 14.04 breaks buildstep
Reorganize buildpacks, because order matters
Hardcode stack name

The newer heroku buildpackes (for example ruby/rails) use the STACK
variable for caching and cache busting (due to the cedar-14 stack).
Without a STACK envvar the caching system is broken and results in the
whole set of gems being reinstalled
Use offical PHP buildpack
Merge pull request #2 from yabawock/feature/stack

Provide stack name
Merge remote-tracking branch 'origin/master' into foreman
Merge pull request #3 from yabawock/feature/php

Use offical PHP buildpack
Merge branch 'master' into foreman

* master:
  Use offical PHP buildpack
Added erlang support
Updated README and AUTHORS
Added build step tests

- Added erlang build pack
- Added Wercker-CI support
Add test for plain Ruby app with MRI 2.1.3

Starting with 2.1.3, Rubies are placed in cedar/ subdirectory.
This test proves that up-to-date version of buildpack
is installed and uses correct stack.
Merge pull request #4 from jnv/tests-ruby

Add test for plain Ruby app with MRI 2.1.3
mkdir /root/bin

This fixes some issues I've seen around the web with php buildpack.  See:

* https://github.com/drmikecrowe/dokku-buildpack-php/commit/00cf93c2f3a60e11f9d4e81a7c110977dbddee41
* https://github.com/CHH/heroku-buildpack-php/issues/160
* https://github.com/romaninsh/dokku-alt-manager/issues/5