Merge pull request #151 from mkalb/changelog

Add new gradle task distChangelog
Add new game type "legacy".
Merge pull request #152 from mkalb/greatconvergence

Add new game type "legacy".
Update logback_jar.xml

Downgrade logging level for file from DEBUG to TRACE
Change logging level back to DEBUG
Merge pull request #153 from mkalb/develop

Change logging level back to DEBUG
Show launcher change log
Fixes #131