Design: Implement the initial Virtual Class
CMAKE: fix the QtPath in cmake
Common: remove example class and add 2D version space and point class
Common: Space2D class init from pgm file, and add /pic folder for
		images we are using
Cmake: cmake to link netpbm lib from /usr/lib, libnetpbm needed
GUI: Add a image loading button and display a map
Common: Space convert to vecto from list, getNeighbors, random points function
Search: Algorithm class with virtual function.

A* class implement.
Cmake: link algorithm into common lib.
Test: Test modules by unit test.