Convert Util to internal class
Remove PrimitiveReader

Not used in solution.
Convert various classes to internal
Convert some Vector methods to internal
Switch TdfNode.IndentationLevel constant to private
Switch TdfNode.WriteTdf from protected to private
Switch ArrayPalette.DistanceSquared to private
Switch some TileAttr methods to internal
Document public Vector methods
Document IModelReaderAdapter
Document MinimapInfo
Document TdfParseException
Document HpiEntry
Document ITdfNodeAdapter
Document TntConstants
Document MapConstants
Document TdfNodeAdapter
Document TileAttr
Document TdfNode
Document ITntSource