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'
Use pyenv to handle the building of multi Python
Numpy can only be installed on some Pythons
We are not system site packages
Install all the packages we need to build
Optimize the builds better
Updated cookies used to download UnlimitedJCEPolicyJDK7 from Oracle

Only the `oraclelicense=accept-securebackup-cookie` cookie should be required.
Merge pull request #285 from karlkfi/master

Updated cookies used to download UnlimitedJCEPolicyJDK7 from Oracle
Replace exit for return

Exiting from a sourced script causes the shell to exit. Returning will result in the desired behaviour.
Merge pull request #286 from koenpunt/patch-1

nvm.sh: Replace exit for return
Updated nvm.sh to match what is current on https://github.com/creationix/nvm
Install JCE package for Oracle JDK 8 [GH-285]
Update sbt-extras script

Former version of sbt-extras launcher has a bug in comment skipping of
jvmopts/sbtopts files.

We also only pre-install Scala final releases, but no milestone or
release candidate. We'll also have to evaluate to remove some old
versions.

Note: At the moment, we can safely keep the sbt cookbook at version
0.3.0 (upgrading to 0.4.0 can wait)
Merge pull request #287 from travis-ci/nvm-update

[wip] Updated nvm.sh to match what is current on https://github.com/creationix/nvm