test-*.py: use imp.find_module to check if we need to use roslib.load_manifest()
add rosbash : temporarily until openrtm_aist_core provides rosbash
start_omninames.sh: fix typo
test-pkg-config.py: add test code to check if file exists, test-joint-angle.py: add more test on setJointAngle
samples/{pa10,hrp4c,samplerobot}.launch: add sample programs