* First version of URL builder (#3)
* Updated API docs
* Added option for default notification service (#56)
* Added support for args in URL Builder (#3)
* Added regex checks in URL builder (#3)
* Added test button when adding notification service
* Updated API docs
* Added recurring reminders on week days (#55)
* Updated API docs
I accidentally committed half of the code for the new URL builder a long time ago, breaking the old method of adding a notification service. Making the URL builder is taking a lot longer than expected, so instead of leaving it broken until I complete the URL builder and then making a release, I've decided to fix it to the old way first, make a release and then include the URL builder in the next release. This means that currently there is a lot of JS code that is not being used or is commented out, because it's part of the URL builder that is coming.
Some of the waitress code has been overwritten to make this work (at `backend.db.ThreadedTaskDispatcher`). The `handler_thread` function has been changed so that when the thread shuts down, the database connection for the thread is also closed (this _has_ to happen _in the thread that the connection is for/from_). The `shutdown` function opens and closes a database connection at the end, which triggers the checkpoint of the journal, writing everything to the db file and removing the `-wal` and `-shm` temporary db files.
