Merge pull request #380 from zrax/nuke_hsStrcpy

Reduce dependency on hsStrcpy
Accept plStrings in plDynamicTextMap for rendering and font names
pfGUIControlMod's font face => plString
GUI List Box items => plString
Python file names and SynchedObj SDL state names => plString
plGenericVar => plString

- Also fixes a bug in plGenericType::CopyFrom, where doubles would get
  only half copied (and therefore become corrupt)
plArmatureMod => plString