ST3 1.3.1

Fixes

• Fix BBCODE bold and italic
• Fix BBCODE gutter line numbers

Migrate to Tag Releases

Migrate to tag releases for ST3.

Migrate to Tag Releases

Migrate to tag releases. ST2 branch is no longer actively supported and will only accept pull requests to back port ST3 features. I will no longer actively provide any work on the ST2 branch except to merge pull requests and do releases so that I can focus on new features and fixes on the ST3 branch.