MultiScreen / MultiPC tracked environment

Now the multiscreen/multi-PC tracked environment get working in our own way. Stonehenge demo upgraded to .net successfully with some vital changes, but while comparing with the lines of original source code the number of lines changed are trivial(I don't think the number of lines is the unit to measure the functionality of software). What important is that now we know how to program the whole system.

The other thing, with upgraded Stonehenge (precisely, the original Stonehenge has the function of load different scene of nff format, but it hadn't been found before I did it) we can load 3D scene from most of 3D application through a shareware software (one month free trial), which can read most of popular 3D files and save as nff file.