Cartoview

Features:
* GeoNode 3.2.1 Upgrade.
* Settings Fixes & Enhancement
* Remove deprecated site_management app

Features:
* GeoNode 3.1 Upgrade.
* Translation for Cartoview pages.
* Removal of custom Admin templates and use new Django Admin design.
* Settings Fixes & Enhancement

oct 24, 2018`
Changes:
- [X] Improve server restart after installing app
- [X] manage apps from admin panel
- [X] Install app requirements on app install
- [X] cherry_server command to start the server
- [X] install_app command to install apps using management command
- [X] delete app config from YAML file before deleting the app record from database
- [X] get apps from the server by server type: Geoserver, exchange, ...
- [X] fix resource details in layers api
- [X] remove duplicated field from App model
- [X] fix apps search layout

New Features:
* pass cartoview version to app-store to get latest compatible version otherwise get latest version.

This release is compatible with [Geonode 2.8](https://github.com/GeoNode/geonode/releases/tag/2.8)

Fixes
* Import fcntl which is not cross platform(was not working for windows).
* filter layer (api) by typename
* add missing fields to all_resource api



Improvements
* ( base.html & index.html) is removed , cartoview templates extend Geonode templates.

Compatibility breaks
* Geonode templates (ext_header.html & apps_header.html) moved
* /apps/rest/app_manager/(layer, map & geonodelayerattributes ) api removed.