Added Web API projects.
Added puzzle controller which calls into SimpleKinKenPuzzleBuilder.
Changed GridCells from multidimensional array to fixed 2 dimension array so it can be serialized.
Changed getters for symbol and type on operation to properties.
Added a Grid abstraction to make serialization better.
Swapped out GridCells in puzzle for a Grid object.
Many small domain changes to enable and improve serialization output.