adding strands_navigation_msgs
adding service for help interface registration
adding .action file for monitored navigation
Adding NavStatitics Message
Adding TopologicalNode Message
Adding DoorCheck action
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.
message for monitored nav logging
Adding NavRoute.msg
changing NavRoute.msg to comply with convention for msg types
Merge pull request #76 from hawesie/hydro-devel

Renamed ros_datacentre to mongodb_store
Renamed datacentre_ rosparams to mongodb_
scitos_apps_msgs has been removed.
All the imports were unused anyway.
Merge pull request #77 from cdondrup/scitos_apps_msgs

Refactoring: scitos_apps_msgs has been removed.
strands_navigation_msgs extraction
Merge branch 'msgs' into hydro-devel

This adds in the strands_navigation_msgs directory from the strands_msgs repo, preserving history.