roscpp: Adding std::vector and std::map rosparam sets/gets

roscpp: adding unit tests for vector/map rosparam

roscpp: vector/dict rosparam fixing commas

roscpp: rosparam left-handed amps

roscpp: rosparam making map/vec sets references

roscpp: rosparam const references in sets

roscpp: rosparam more left-handed amps

roscpp: adding consts to rosparam std::map setters
Merge pull request #279 from jhu-lcsr-forks/feature-roscpp-composite-rosparam

roscpp: Adding std::vector and std::map rosparam sets/gets