Update .gitignore to include default wizard directories & confs [ci skip]
Add refresh command
added refresh command to Topic plugin
tests.py: wAdded Refresh and Restore tests. plugin.py: Empty lastTopics[channel] raise a KeyError for testing purposes.
Merge pull request #907 from GLolol/update-gitignore

Update .gitignore to include default wizard directories & confs
Merge pull request #909 from joulez/topic_refresh

Topic refresh