Structure for iterator demos.
Merge branch 'feature/occupancy_grid_visualization' into feature/new_iterators
Merge branch 'master' into feature/new_iterators
Merge remote-tracking branch 'origin/master' into feature/new_iterators
New polygon class, added circle iterator, improved efficiency of polygon iterator, and extended the iterator demo.
Added line iterator based on the Bresenham Line Drawing algorithm.
Merge branch 'master' into feature/new_iterators