Dependencies:    vtd(cfitsio), petools(readline,atlas,X11)

Libraries VTD and PETOOLS should be installed

Under tcsh or csh, you 

1) execute source your_install_directory/petools_vars

2) configure gvh with command 
   ./configure --prefix=...  --with-petools=...  --with-vtd=...

   where ... should be replaced with appropriate directories where
   the packages were installed and where you want to install gvh.

3) make

4) make install

