Quest Menu Changes

as per #97, a couple remaining quest menu changes

Features:
+ Added location and sub location image / description support
+ Added Completion Descriptions. This is a summary description that shows
up when you complete the quest (in aqua! oooooOOooo....). note that in
order to support this the description text box has been changed from 400px
height to 200px height.

Bug Fix:
- Quest List had some problems with the pointer and "completed" quests. This should now be fixed
- An edge case where a completed quest that had not been read yet was
  causing graphical inconsistencies. This is now fixed