some changes to make things work with LSB
Merge branch 'foil-bolt-merge' of github.com:jzxu/SVS into foil-bolt-merge

Conflicts:
	SConscript
check for glXGetProcAddress versus glXGetProcAddressARB in SConscript
fix resize and mouse bugs in viewer
I took out the cursor hiding function because it was causing incorrect
positions to be reported in some cases.
lower states no longer send their scenes to the viewer by default