Install Android SDK 22.6.2 by default
Update pre-installed components

- Remove Platforms with API 8 and 14
- Bump Build Tools to 19.0.3
Fix GH-11: Add license black/white lists
KISS: Re-introduce the basic idempotent guard

Related to GH-12 and GH-10
Update Credits, etc.
Update CHANGELOG
Rewind cookbook version to let stove do the job
Update git/chef ignore rules