use include guards and extern C in vecmat.h
move remaining functions from kuhl-util to vecmat
include stdlib.h for abs() in vecmat.c
include math.h in vecmat.h for the inline functions defined in vecmat.h
store IP address of VRPN server in a file in the users home directory instead of coded into the source code.
Fix mistake introduced by previous commit
Add missing fclose()
Load and render models that contain points and lines (in addition to triangles)
Check that each mesh only has a single primitive type
Correct warning message when divide by 0 occurs
add a function to count number of geometry objects in the linked list
remove bounding box from geometry struct since it is no longer used; other minor changes
Merge branch 'unstable'