Add multi coast HOLD order
Add multi coast HOLD order
Add Parser multi coast support for SUPPORT and CONVOY

-Massive (and perhaps ugly) refactor of get_aux.  This will likely get cleaned up.
  -Use standard multi coast province regex to look for coasts and build composite hash

This should probably be broken down (eventually) into smaller private methods.
In it's current form, get_aux() badly needs comments just to be understood.
To be revisited.