cleaned up repo, fixed precomputer to reflect new motif libraries
lots of stuff added
fixed sterics bug in build_task.py
finished basic implemention of BuildTaskMulti and improved C++ class coverage
continue to make broad improvements concerning precomputing and build task
more changes, BuildTaskMC almost done
added a lot more documention
almost done with BuildTaskMC
almost done implementing BuildTaskAStar, need to do more unittests