- Added events for stats, experience and leveling.
- UI window can listen for these events and update itself now.
- Renamed i_stat_modifiers to istat_modifiers
- Added check for nil, and if a parameter is nil don't add a warning if it doesn't have a comment.
- Started to add better error checking and handling for Lua.
- Renamed all primitives to be lower case (Integer -> integer, String -> string, etc).