Parser.cs
	added getNormalVector(out x, out y, out z);
	Now text specifications don't have to have normalized x, y, z values,
	they are automatically normalized in the parser

Cover.cs
	changed testPartial name only to depthFirst
	adding breadthFirst( .. )
	
---------------------
April 10
      Most of Parser is private, only one exposed static function: compile().
      Fixed error messages for not enough points for polygon or chull
      changed all exceptions to applicationexceptions
April 20
      Namespaces fixed:		Spherical.HTM instead of HTM
May 16
      fhtmmagic removed

May 22
      fHtmCoverTypedRegion added -- computes threee columns,
      last column is 1 for full and 0 for partial
May 24
      fHtmFullCoverRegion added -- same as fHtmCoverRegion, but computes
      only full trixels