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'
Integrate community/android-sdk v0.1.0 (released)
Merge pull request #153 from travis-ci/add-android-sdk

Add 'android-sdk' cookbook