remove install command for gazebo subdirectory
Merge branch 'hydro_dev' of github.com:ipa320/schunk_modular_robotics into hydro_dev

Conflicts:
	schunk_description/CMakeLists.txt
output long unsigned correctly
add definitions to get rid of some compiler warnings
use const char* instead of char* to get rid of some compiler warnings
Merge pull request #58 from mas-group/hydro_dev

Handle some compiler warnings