Start new pkg mrpt_local_obstacles.
Fixes in package.xml's
Start node subscriptions.
Added demo launch file.
First working version of local map
local obstacles: show debug GUI
avoid publish in nobody is listening
First working version of the reactive navigator
Removed 'mrpt' dep from catkin_package().

I *think* this is giving problems to dependant pkgs and is not needed...
fixes for mrpt 1.3.0
tune reactive params
Merge pull request #12 from mrpt-ros-pkg/add-reactivenav

Add reactivenav & local_obstacle_map pkgs