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

Compiler/boost/modulefile

@@ -1,10 +1,10 @@
 #%Module1.0
 
-set whatis	"C++ libraries"
-set url		"http://www.boost.org"
-set license	"Boost Software License"
-set maintainer	"Achim Gsell <achim.gsell@psi.ch>"
-set help	"
+module-whatis		"C++ libraries"
+module-url		"http://www.boost.org"
+module-license		"Boost Software License"
+module-maintainer	"Achim Gsell <achim.gsell@psi.ch>"
+module-help		"
 Boost is a set of libraries for the C++ programming language that provide
 support for tasks and structures such as linear algebra, pseudorandom number
 generation, multithreading, image processing, regular expressions, and unit
@@ -12,4 +12,3 @@ testing. It contains over eighty individual libraries.
 (Wikipedia)
 "
 
-source		$env(PSI_LIBMODULES)