added a bunch of packages and added submodule

var/spack/packages/py-python-dateutil/package.py

@@ -0,0 +1,12 @@
+from spack import *
+
+class PyPythonDateutil(Package):
+    """Extensions to the standard Python datetime module"""
+    homepage = "http://labix.org/python-dateutil"
+    version("2.2", "c1f654d0ff7e33999380a8ba9783fd5c",
+            url="https://pypi.python.org/packages/source/p/python-dateutil/python-dateutil-2.2.tar.gz")
+
+    extends("python")
+
+    def install(self, spec, prefix):
+        python("setup.py", "install", "--prefix=%s" % prefix)