Add first draft of 'android-sdk' cookbook
Update and Improve Android SDK cookbook

- Now depends on 'ark' cookbook (for sweat download/unzip tooling)
- Fatal error if not provisioning a Linux 32-bit OS
- Download SDK 21.1 (last version without interactive prompt about
  license agreement)
- Preinstall a maximum of relevant SDK components (including SDK 22+)
Android SDK updates: keep it simple at the moment
Add support of Ubuntu 64-bit + various fixes

This cookbook has been extracted to
https://github.com/gildegoma/chef-android-sdk
for generic community development, but keeping as goal to satisfy
Travis CI needs in the future and thus keep both in sync.
Fix ANDROID_HOME issue and reorder recipe steps

android-maven-plugin requires a trailing slash if ANDROID_HOME refers to a symbolic link
(see more unix convention debates if you want ;-)
Synchronize Android cookbook with upstream repo

Based on https://github.com/gildegoma/chef-android-sdk/commit/79b8bc13d799150c79d3fd31811a82568db5b068
Android: install older System Images with '--all'
Merge pull request #246 from dmalikov/master

ghc_find in separate executable
Update changelog.
Update changes.md
Configurable hhvm package name.
Support for a pre-release of HHVM 2.3.0.
Fix HHVM version and package URL.
add encodings to metadata files that use non-ascii chars
Merge pull request #247 from travis-ci/sf-fix-encoding

add encodings to metadata files that use non-ascii chars
HHVM 2.3.0 has been officialy released!
Use a symlink instead of a shim for HHVM to fix PHP's command line emulation.

Fixes travis-ci/travis-ci#1746.
Support for PHP 5.4.23 and 5.5.7.
Update Perl versions to latest in their branch
Merge pull request #250 from travis-ci/hh-update-perl-versions

Update Perl versions to latest in their branch