Update to views library now in vault

From: Gary Powell (Gary.Powell_at_[hidden])
Date: 2000-04-21 15:11:36

After I put the library up, I remembered that boost prefers the 
include files use .hpp. So they all do now.

I also added a VIEW_fwd.hpp file for each view. This way if you wish 
to reduce the dependency list in your include file it is possible. 
Each *_fwd.hpp file has just enough of the definitions so that it is 
possible to define a view. (But not use it.)

Each actual view includes it's VIEW_fwd.hpp file so that if the 
definition of the view changes the compiler has a chance to catch it.

-gary-