Define proper bash environment in helper and add it to every execute resource where aptly is invoked

Conflicts:
	recipes/install.rb
Add repo resource parameter to be able to define multiple aptly_repo resources + add already declared -remove-files support
test to make sure aptly is installed
aptly_test test cookbook
correctly incorporate an aptly_test cookbook for testing
release notes for v0.2.2
Merge pull request #7 from hw-cookbooks/develop

Version 0.2.2