currently there are a couple of plone packages that define tiles; collective.cover should be able to handle them as well:
there's currently an issue with permission when trying to use the tiles:
ConfigurationExecutionError: <type 'exceptions.ValueError'>: ('Undefined permission id', 'plone.ModifyDecoLayout')
use Plone standard tiles on tests; refs #81
add warning message regarding Plone standard tiles (refs. #81 and #112)
remove unused dependencies.