Lab 3 Commit so I am able to pull new stuff
Merge branch 'master' of https://github.com/ajthompson/turtlebot_labs
Divided up stuff from lab3
Conflicts:
	src/lab3/scripts/astar_server.py
Merge branch 'alec'
Added separate files for navigation node, make_obstacles,navigation
imports and obstacle expansion
Fixed ranges on A* that caused crash when it reached the edge of the map. Also fixed a few errors introduced while merging.
Fixed ranges on A* that caused crash when it reached the edge of the map. Also fixed a few errors introduced while merging.