removed some .pyc files and made drawing_tool file
Merge branch 'master' of https://github.com/dexterduck/fastslam
Wrote some basic tools for converting occupancy grids into images.  First convery occupancy grids to .npy with grid to npy function, then convery .npy file to image with npy to map image function.
Merge branch 'master' of https://github.com/dexterduck/fastslam