- added default constructor to CA::Point class, as MSVC complained.
- add two functions to the HexAsciiGrid class, as these are needed by DLL or comparison program, not fully implemented yet
    void addAsciiGrid(AsciiGrid<T>& grid2, bool print = false); which adds the data of one grid into another using geo-cordinates
    Errors compareAsciiGrid(AsciiGrid<T>& grid2, T tolerance = 0.0, bool print = false); which compares the difference between two grids, likey this will be the same as for square grids.
- minor debug of mapping real value to arrays of length two, for some reason MSVC didn't like this so replaced with Points which hold the two values.