[COOK-2441] - use correct attribute setter for cacher['ipaddress'] in recipe::cacher-client for Chef 11
[COOK-2660] Add Debian 6.0 "squeeze" specific acng.conf
Update test-kitchen support

* requires vagrant 1.1, test kitchen 1.0.0.alpha.2
* Removes vagrantfile (now handled by kitchen-vagrant 0.7.4+)
* Add TESTING.md doc
increment version for development
release v1.9.2
increment version for development
Merge pull request #37 from ninefold/COOK-2441

[COOK-2441] - use correct attribute setter for cacher['ipaddress'] for Chef 11
Merge pull request #39 from tmatilai/COOK-2660_squeeze-acgn-template

[COOK-2660] Add Debian 6.0 "squeeze" specific acng.conf