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.
Merge pull request #2 from zeroch/master

Map Display and Algorithm class.
Cmake: clean cmake file, temp disable test, due to fail to conpile.

add QImage at Space to r/w map.
Common: take away netpbm, use QImage class to parse map image.
Merge pull request #3 from ivandariojr/ze

use QImage instead of libpgm or netpbm
Merge with master
A star stubs