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

Tools/global/modulefile

@@ -1,11 +1,11 @@
 #%Module1.0
 
-set whatis	"source code tag system"
-set url		"http://www.gnu.org/software/global/"
-set license	"GNU GPL v3"
-set maintainer	"Achim Gsell <achim.gsell@psi.ch>"
+module-whatis		"source code tag system"
+module-url		"http://www.gnu.org/software/global/"
+module-license		"GNU GPL v3"
+module-maintainer	"Achim Gsell <achim.gsell@psi.ch>"
 
-set help	"
+module-help		"
 GNU GLOBAL is a source code tag system that works the same way across
 diverse environments, such as Emacs editor, Vi editor, Less viewer, Bash
 shell, various web browsers, etc. You can locate specified tags, such as
@@ -17,6 +17,5 @@ any editor. It runs on a UNIX (POSIX) compatible operating system, like GNU
 and BSD. 
 "
 
-source		$env(PSI_LIBMODULES)