Merge pull request #16 from nilsbore/master

Changed the cmake file to be more catkin-oriented, changed small stuff to make decompressor use the right filenames. Just bugfixes.
Merge pull request #17 from nilsbore/master

Added timestamps to be able to recreate the stream later together with a rosbag. Merging this since it worked on my computer and I did not add files this time=P
Added ros messages and deleted unnecessary printouts so that the rosbag will keep on playing while there is images coming in