Add route part handler support
Route part handlers are classes which follow a certain interface and can resolve one ore more URL segments as well as build up URL parts from given data.
E.g. we'll need a route part handler to resolve titles of TYPO3 pages.
The configuration will look something like
'package' => 'TYPO3',
'controller' => 'Page',
'action' => 'default',
'language' => 'en'
'language' => 'F3_L10N_Routing_ISOResolver',
'page' => 'F3_TYPO3_Routing_PageResolver',
'pluginOptions' => 'F3_TYPO3_Routing_PluginResolver'