Fix TypeError exception in db.py on add activities

Fix TypeError exception: tuple indices must be integers, not str.
Do not create new connection for each notification

This typo caused creation of new dbus connection every time a
notification was sent.
renamed function for storing tag autocomplete preferences
fixes #80
Merge pull request #121 from sebastian-leidig/master

corrected function name: set_tags_autocomplete -> update_autocomplete_tags
Merge pull request #119 from tbabej/Fix_typo_bug

Typo notification_conn -> _notification_conn : Do not create new connection for each notification
Merge pull request #112 from msize/patch-2

Fix TypeError exception in db.py on add activities
Use correct uchar type for notification 'urgency' hint
Follow notification daemon name owner changes in case it is restarted and the previous connection becomes unusable
Merge pull request #127 from pkerling/master

Use correct uchar type for notification 'urgency' hint and follow name owner changes
v1.04 - bugfixes of last 12 months
kill contrib - obsolete, gives the wrong idea
forgot to bump version to 1.04
Merge https://github.com/projecthamster/hamster