1.5.0

• Remove obsolete realsense_navigation files.
• Add depth control preset option (#106)
• Modify launch files for topic remapping.
• Use node handles to enable easier remapping
• Remove invalid SR300 Camera option
• Added multiple cameras support for camera power services (#103)
• Added services to start and stop the camera (#85)
• Added a RGBD launch file for SR300
• Clean-up CMakeLists.txt for librealsense
• Contributors: Amber Elliot, Kevin C Wells, Mark D Horn, Séverin Lemaignan, Tully Foote, Rajvi Jingar