Merge pull request #18 from smits/master

update python tools since rosdep stopped working
Updated GPSTk to 2.3.0 release
- Removed old patches
- Added patch that fixes XCode 5.1 clang update for " gpstk/lib/Geomatics/SatPass.hpp:474:15: Friend declaration specifying a default argument must be a definition "
Merge pull request #19 from venabled/fix-gpstk2.3.0

Updated GPSTk to 2.3.0 release
ros-collada-dom port not needed as changes merged upstream.
Remove dependencies to ros specific log4cxx, use upstream fixed version.
Remove row specific log4cxx port (upstream works).
Removed row specific version of GDAL as fixes were pushed upstream to macports port.
Merge pull request #4 from kyonifer/master

Update from upstream