Added point cloud publication for debugging costmap clearing.
Merge pull request #76 from ros-planning/debug-clearing

Added point cloud publication for debugging costmap clearing observations.
Merge pull request #75 from corot/hydro-devel

Issue #74: Looks for obstacles layer, but the default plugin name is obstacle_layer
Added parameter layer_search_string to clear_costmap_recovery.
Changed costmap_2d_publisher from latched topic to one that republishes the latest full costmap to each new subscriber.
Merge pull request #79 from ros-planning/costmap-auto-republish

Changed costmap_2d_publisher from latched topic to one that republishes the latest full costmap to each new subscriber.
Removed costmap_2d/msg/OccupancyGridUpdate.msg and pointed to map_msgs instead.
changed from costmap_2d/OccupancyGridUpdate to map_msgs/OccupancyGridUpdate in enhanced_nav_display
Merge pull request #80 from ros-planning/use-map-msgs

Use OccupancyGridUpdate message from map_msgs package now that it's been released.
removed enhanced_nav_display package: superceded by hydro rviz MapDisplay change
Merge pull request #81 from ros-planning/delete-enhanced-nav-display

removed enhanced_nav_display package: superceded by hydro rviz MapDisplay change
fixed robot_pose_ekf's inclusion of bfl for hydro, whose include directory layout changed.
Removed layered_costmap_plugin, which was incomplete.
move_base: uncommented contents of loadDefaultRecoveryBehaviors().
a bit of progress committed to send the code to another computer.
costmap_2d: array_parser.cpp compiles and tests work.
Still more to finish in costmap_2d_ros.cpp
Added support for footprint from rosparam.  Test currently crashing.
fixed crashing tests in costmap_2d
Install headers in some packages
Make sure libraries are explicitly linked

Otherwise linking fails on OS X, which is stricter
than Linux.