ignore RightButton clicks
fix the licenses in each file
cleanup a bit
rename some classes/files

Hexgrid -> HexdameGame
Board -> HexdameView
move some common definitions to a separate file

commondefs.h now contains Coord, Move, Piece and Color.
fooling around with constness
move same functions into their own namespace
move qHash definition to commondefs
major changes to allow for jumping