Remove duplicated sidebar code
Add sidebar as an include
Remove "Explore" prefix from buttons in the sidebar
Merge pull request #314 from gem/include-sidebar

Add 'Explore docs' and move sidebar in includes
Fix wrong url in /admin
Merge pull request #316 from gem/fix-admin

Fix wrong url in /admin
Copy _permissions.html from GeoNode src
Change default perms: any registered user can view only owner can edit
Merge pull request #317 from gem/docs-def-perms

Change default permission for new uploads
Merge remote-tracking branch 'origin/master' into icebox-maps
Fix minor issues and add only base layers marked as "background"