Added mentor-marker.png to content\images.
Added mentor-marker.png to content\images.

This is for use on the organization home pages having the map displayed.

Patch by: Madhusudan.C.S
Reviewed by: Lennard de Rijk

MatthewWilkes/mw4068-packaging,MatthewWilkes/mw4068-packaging,MatthewWilkes/mw4068-packaging,MatthewWilkes/mw4068-packaging