#64 Navmesh (nav pathing files) functionality needs grid support

To deprecate SPGrid we need navmesh to integrate grid id's. This was not part of the original project to implement maps/nav paths so will need to be done individually.

due to complications in setting up the new dev machine moving to leo 2.0

Delayed by Issue #198

example of SPGrid not returning proper grid id:

lavastorm in DoF client at -234.45 -129.92 265.92

this was actually completed as of 80add76130