"[Map Manager] Add Services"

Added services for #17, but their functionality is not yet implemented. Please give feedback if the input and output of the new services are the expected ones (especially the geometry_msgs/PoseStamped input for SetMapPose). I used the existing messages and C++ code as a basis. @raphael @buchhold @mmints @thomasweiland

added 3 commits

• 657add6c...7278bf80 - 2 commits from branch master
• bc0ce154 - Merge branch 'master' into 17-map-manager-add-services

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Mach mal das Work in Progress weg, wenn ich das mergen soll.

unmarked as a Work In Progress

Erledigt

merged

mentioned in commit 6a5a4446