update developer install to reflect README updates
Merge branch 'master' of https://github.com/GeoNode/geonode into master_geonode
fix title underline too short
fix indent to short
added settings to doc tree
Merge remote-tracking branch 'upstream_geonode/master' into master_geonode

Conflicts:
	docs/reference/developers/settings.txt
	docs/tutorials/devel/install_devmode/index.txt
added settings ref to index