Static building

I had trouble today understanding how to compile jss and javascript, getting some things installed globally, then locally, then having to redo all again.

After some help from @simod I ended up updating paver to handle: 'paver static'. This now works even if node or npm are not installed in the system and are very friendly for beginners.

With this PR, if someone cd's to geonode/static and does not know if we are using grunt, bower-install, lessc, compass, sass, mvn, ant or any other can just type make and have the javascript or css be regenerated.

-a