updated 305 version history
Merge branch 'rel-305' into dev
Add NPC vertical object detection tweak

Closes #141
Make GMST negative value check Oblivion-specific
Update message for negative GMST values

The old message implied that only float GMSTs couldn't be negative. The
negative-value check doesn't discriminate between GMST types, so the new
message reflects that.
Merge branch 'trira-issue_141' into dev
Add missing data files to skyrim_const.bethDataFiles

Closes #143
added aditional comments to  MelCoed
Added MelPerks
Added MelSpells
Removed Odd Linebreak
Added additional comment to  MelModel
Added MelDestructible
Added MelEffects
Added MelDecalData
Added MelScrxen
Added MelOwnership
Added MreActor
Added MelIcons
Updated comments for TES4 Record