Ze

Common: 
Point2D and Space2D are full work. 
and this is support with pgm image import.
In the point demo, we can use a image file name and convert it into Space2D class. 
Points are created and push back into worldmap list. 
It is straightforward, so I skip the comments. 

CMake: 
cmake files are edited to build the sub project : point. it is link to libnetpba.so.
use sudo apt-get install libnetpba to add the pgm file library.