Whitespace
Add change-number command

Fixes #12
Whitespace
Introduce quiet_hours config

Fixes #7
Merge remote-tracking branch 'olle/master' into change_number

Conflicts:
	core.py
	smskrupp
change-number for all groups, close #12
removed quiet stuff, needs to be per list
Merge pull request #17 from oau/change_number

Change number