WIP Cartridge Refactor

* Added oo-user-ctl-gear
* Refactored application_container to support start/stop/...
* Refactored V2CartridgeModel#process_cartridges
* Updated documentation for `control build` and application template directories
Merge pull request #7 from jwhonce/dev/wip

WIP Cartridge Refactor
wip: add ApplicationContainer#{add,remove}_cart
wip: skeletal mock cart integration tests
wip
wip: rename mock cart
wip: mock cartridge spec
wip: mock cart rpm
Automatic commit of package [openshift-origin-cartridge-mock] release [0.2-1].