Merge pull request #1 from kreldjarn/wip-frontend

Wip frontend
Merge pull request #2 from kreldjarn/wip-frontend

Wip frontend
UI card editor finished.

Some backend changes, added an delete_card method for /delete/card/<ID> url pattern but does not seem to work at the moment. Anyways, the frontend is ready for all the features and has to be tested now.