Support custom cartridge URLs
Allow URLs to be passed to app creation and cartridge addition.  Clean up a few minor visual bugs, use the <verb>-<noun> form when referring to other commands
Merge remote-tracking branch 'origin/master' into support_external_cartridges

Conflicts:
	lib/rhc/commands/domain.rb
Rename "external cartridge" to "downloaded cartridge".  UI should call them "personal" cartridges
Merge pull request #370 from smarterclayton/support_external_cartridges

Merged by openshift-bot