Merge branch 'develop' into mplegendre-multi_pkgsrc_roots

Conflicts:
	lib/spack/spack/cmd/create.py
	lib/spack/spack/cmd/extensions.py
	lib/spack/spack/cmd/fetch.py
	lib/spack/spack/cmd/uninstall.py
	lib/spack/spack/config.py
	lib/spack/spack/database.py
	lib/spack/spack/directory_layout.py
	lib/spack/spack/packages.py
	lib/spack/spack/spec.py

var/spack/repos/builtin/packages/py-pyside/package.py

@@ -2,7 +2,7 @@
 import os
 
 class PyPyside(Package):
-    """array processing for numbers, strings, records, and objects."""
+    """Python bindings for Qt."""
     homepage = "https://pypi.python.org/pypi/pyside"
     url      = "https://pypi.python.org/packages/source/P/PySide/PySide-1.2.2.tar.gz"