Enable logging off warnings from django (so that we can prepare a upgrade to 1.5)
Make manage.py executable.
Changed directory structure a bit.

All static files now lie under static-src, and grunt will produce all the content of
static, which will also be copied over to the fileserver. This makes it possible to
exclude the entire static folder in git, preventing lots of files to ignore. Also
moved all external libraries under static-src/js/libs, to make it easier to run
linting on our own code.

Updated Gruntfile and templates to reflect the change of library paths.