Migrate HelpCommand to Commandant
Migrate entry point code to Commandant
Merge branch 'master' into extract-entry-point

Conflicts:
	Cartfile
Merge branch 'extract-help-command' into extract-entry-point

Conflicts:
	Cartfile.resolved
	Carthage/Checkouts/Commandant
Merge pull request #252 from Carthage/extract-entry-point

Migrate entry point and HelpCommand to Commandant