use Pmodules extended commands in modulefiles (fixing issue #3)

Compiler/mpich/modulefile

@@ -1,19 +1,17 @@
 #%Module1.0
 
-set whatis	"a high performance implementation of the MPI standard."
-set url		"http://www.mpich.org/"
-set license	"BSD-like"
-set maintainer	"Achim Gsell <achim.gsell@psi.ch>"
-set help	"
+module-whatis		"a high performance implementation of the MPI standard."
+module-url		"http://www.mpich.org/"
+module-license		"BSD-like"
+module-maintainer	"Achim Gsell <achim.gsell@psi.ch>"
+module-help		"
 MPICH is a high-performance and widely portable implementation of the
 MPI Standard, designed to implement all of MPI-1, MPI-2, and MPI-3 (in-
 cluding dynamic process management, one-sided operations, parallel I/O,
 and other extensions). 
 "
 
-source		$env(PSI_LIBMODULES)
-
-set-family	MPI
+module-addgroup	MPI
 
 setenv		MPICC			$PREFIX/bin/mpicc
 setenv		MPICXX			$PREFIX/bin/mpicxx