Core API

[ipadjen]

Continuing work on the API here

todo:

• [x] Docs - do it in the later PR
• [x] Test
  • [x] C++ API
  • [x] Python API
• [x] https://github.com/3DGI/roofer-dev/issues/13
  • [x] CI for the python API?
• [x] Replace cout with logger
• [x] Clean and sort out the example
• [x] Remove extra from cdt_util.cpp

[ipadjen]

I placed the python bindings in the the rooferpy folder for now.