Version change to v0.2.1

Got a bit confused with the versioning numbers...
Merge pull request #37 from Mpstark/feature/multi_keys

Allow Multiple Multi-Key Key-Binds, Advanced Settings
Update settings display when listening mode changed in advanced settings (fixes #40)
Merge branch 'feature/multi_keys' of github.com:Mpstark/articulate into feature/multi_keys