Dir creation from Tenant + Test
Added an integration test to assert behavior.  Enhanced JavaDoc.
Merge pull request #22 from stormpath/directory_crud

Directory crud - UAT passed w/ IT tests performed against production api.stormpath.com
Fixed test assertions (equals arguments were reversed)
Merge branch 'dev' into account_store_mapping

Conflicts:
	extensions/httpclient/src/test/groovy/com/stormpath/sdk/client/DirectoryIT.groovy