Fixing naming consistency in gfx
Implementing RL_Ref conversion

The idea is that an RL_Ref of one type can be converted to mostly any
other type of RL_Ref in some logical way. So a REF_OBJECT can be
converted to a REF_LOCATION representing the location of the object, and
other reasonable conversions.
Moving separate game states into their own subdirs

Looks dumb now but when there are more states this will be a Good Thing
Minor bugfixing in colors