Rename ros_import into ros_publish, and ros_export into ros_subscribe.

The old names are kept for now, but will disappear in the
future.
Modify RosRobotModel to derive from sot::Dynamic
Merge remote-tracking branch 'origin/groovy' into groovy
Merge pull request #15 from bcoudrin/groovy

Modify RosRobotModel to derive from sot::Dynamic
Add a script to publish JointState to TF
Merge pull request #16 from bcoudrin/groovy

Add a script to publish JointState to TF
Synchronize cmake submodule.
Correct installation path for the lib.

In the ros independent packages, this test is realized
in the SETUP_PROJECT routine.
Without this test, the libirary may be installed in the
wrong folder.