fixes #46
Merge pull request #47 from bacongobbler/master

remove bpwatch hack
Add image tagging support
Merge pull request #49 from opdemand/tagging

Add optional image tagging support
fix broken python buildpack by generating a random request id used by bpwatch instrumentation
Merge pull request #51 from opdemand/pythonfix

Generate request ID for broken python buildpack
pass bin/release $build_root instead of $app_root

Needed by heroku-buildpack-ruby
Merge pull request #56 from icco/patch-1

pass bin/release $build_root instead of $app_root
comprehend buildpack urls with treeish components
Use https://github.com/CHH/heroku-buildpack-php as the builtin PHP buildpack
Merge pull request #57 from qrohlf/patch-1

Use https://github.com/CHH/heroku-buildpack-php as the builtin PHP buildpack
use the build root to build the release file
updating authors
Merge pull request #58 from nolman/fixing-ruby-heroku-buildpack

Fixing ruby heroku buildpack
Added libmcrypt-dev
Merge pull request #62 from jbrooksuk/patch-1

Added libmcrypt-dev
Use a subdirectory of /cache

Heroku tends to remove the /cache directory.
This causes issues with dokku, when we mount it using docker volumes.
So make the buildpacks use a subdirectory of the mount point.
Merge pull request #64 from plietar/cache-subdir

Use a subdirectory of /cache
Add support for jekyll
Merge pull request #65 from pandrew/30-jekyll-buildpack

Add support for jekyll