costmap_2d: tf_prefix support in obstacle_layer
costmap2d: only prefix sensor_frame when it's not empty
deallocates costmap_ before reallocating
Merge pull request #266 from efernandez/costmap2d_resize_memory_leak

Call deleteMaps before initMaps
Added waitForTransform to bufferCloud to solve extrapolation into the future exception
Merge pull request #270 from pronobis/hydro-devel

Added waitForTransform to solve extrapolation into the future exception
Merge pull request #258 from clearpathrobotics/obstaclelayer-tf-prefix

costmap_2d: tf_prefix support in obstacle_layer
adds DepthImage data_type
uses depth_image_proc headers