Here is a cleaned up hitlist that should solve the PLib conflict

Here is a cleaned up hitlist that should solve the PLib conflict
and fixes a 'potential bug' if the FGFS View code were to change

I also consolidated the specialized IntersectLeaf()
as they really didn't gain us much outside of their having
'more direct access into the SSG controlled data'

I would like to see the fgCurrentElevation functions moved
out of hitlist.cxx.

The one obstacle is their being dependent on my PLib
auxillary functions

ssgGetEntityTransform()
ssgGetCurrentBSphere()

code has been run through astyle with the default options