Merge pull request #15 from cdondrup/hydro-devel

Removed `topological_utils` from memory_game_msgs dependencies. Not needed any more.
Messages for head orientation.
added information to monitored navigation action result. SUCCEEDED and PREEMPTED are redundant info as they are also present in the action status but I put it in for completeness. There are different types of failures, with GLOBAL_PLANNER_FAILURE meaning that the goal is blocked by an object.
Merge pull request #16 from BFALacerda/hydro-devel

added information to monitored navigation action result
Messages for managing the head orientation service.
Merge branch 'hydro-devel' of https://github.com/strands-project/strands_msgs into hydro-devel