gd: Some string nelgth + typo fixes
Merge pull request #390 from gunchleoc/master

gd: Some string nelgth + typo fixes
Update game prefix for Empyrean mod

This prevents save games from getting mixed with alpha_demo.
Merge pull request #391 from dorkster/fixes

Update game prefix for Empyrean mod
Add descriptions/dependencies to mods
Merge pull request #392 from dorkster/mods

Add descriptions/dependencies to mods