Fixed depth (in 32FC1 format according to REP118) and bw image publishing.
Optimized bw and rgb8 image publishing.
Added object functionality to WorldToROSTF
Merge pull request #30 from tut-yury/depthsensor_rosinterface_fix

Image's ROS publisher fixes and optimizations.
Merge branch 'hydro-devel' of https://github.com/uji-ros-pkg/underwater_simulation into hydro-devel