[IMP] Use blueprints for plugins
[REF] Use a blueprint in the Collaboration plugin
[REF] Use a blueprint in the IM plugin

also fix the blueprint name check to handle spaces in plugin names
[REF] Use a blueprint in the EPayment plugin
[REF] Use a blueprint in the importer plugin
[REF] Use a blueprint in the livesync plugin
[REF] Use a blueprint in the statistics plugin
[FIX] Blueprint name check in subplugins
[REF] Use a blueprint in the search plugin
[REF] Remove unused wrapUH
[REF] Use endpoints in the epayment submodule UHs
[DEL] Duplicate urlhandlers.py