Added code for Marker Array
Merge branch 'vj_gui' of https://github.com/rxdu/FallRiskProjectROS into vj_gui
Added Marker Array
Update README.md

Added octomap-server in the dependencies in installation section
Added Map to the GUI
Modified the directory structures for maps to be compatible on any new machine
Merge branch 'vj_gui' into hydro_devel
added labels for rviz tools