Updated Dandelion-Datatables bundles
* According to the new bundle representation
* Added vendor bundle
Moved UrlUtils to dandelion-core
Updated DatatablesBundleLoader due to recent changes in API
Updated API due to recent changes in Dandelion core
Fixed tests
Removed the main.base.url configuration since it's not needed any longer
Fixed ExtraJsFeature due to recent changes in API
Minor changes due to recent changes in the Dandelion API