<cartridge versions> origin_runtime_219, fix up references to renamed carts
https://trello.com/c/evcTYKdn/219-3-adjust-out-of-date-cartridge-versions

Basic search and replace
Merge pull request #437 from dobbymoodge/fix_tests_card219

Merged by openshift-bot
Added "rhc env-var [list|add|remove]" commands to handle user settable environment variables
Added "rhc env-var show" command, syntax adjustments
Now handling empty :arg_type == :list as nil arg, env var now supporting a list of variables, improved descriptions
Moved app to an option instead of argument on all rhc env commands except list
rhc show-env
Unset multiple env vars
rhc set-env now handles files as input
Create app and add cartridge can handle env vars from files
Broke spec tests, reverting
Spec tests for env variables
Spec tests, handling buggy REST API environment_variables attribute
Fixed rhc show-env
Improved spec coverage
Spec tests with complete coverage
Fixed spec tests on Ruby 1.8
Using --quotes to format output of env vars with double quotes, spec tests
Improved spec tests for env vars
Removed feature tests from env vars for now