define main() before calling it

this fixes #24
Merge pull request #25 from mintar/fix_issue24

define main() before calling it
catkinization of pr32_common_action_msgs
catkinization of pr2_tuck_arms_action; also removed code in tuck_arms_main.py that duplicated stuff in tuck_arms_test
Merge pull request #26 from bosch-ros-pkg/hydro-devel-catkinization

Hydro devel catkinization