Added a CMakeLists.txt that can replace Makefile

 - has a default-target that builds dob (make )
 - has a custom target to trigger a new build (make new)
 - has a target for Doxygen documentation (make doc)
 - current Makefile could be removed, simulates almost all the behaviour
Merge pull request #9 from slizzered/feature-CMake_support

Feature: CMake support