Merge pull request #2 from JanX2/master

Improvements
Update README.md
Dual licensing: BSD and GPL3
Merge commit 'd39cda558ed0a1224407433f97f625a0a3ce5a4e'
Use the 2-clause BSD license
Updated information for Release 0.3
Merge branch 'release-0.3'
Download/install instructions
Added usage instructions
Merged changes by Jan Weiß
Release 0.4
Merge pull request #1 from heatherleaf/master

Keeping the SubTTS repos in sync