Allowed for creation of zero-sided dice
Updated unit tests to allow zero-sided die
- Changed "not contributing to initiative" signalling value from 0 to -1
- Added Dead Guy to button list
Updated Dead Guy button ID to 687
Merge pull request #1353 from blackshadowshade/1304_dead_guy

Implemented Dead Guy
Merge branch 'master' of github.com:buttonmen-dev/buttonmen