Context GUI updated with the following functionalities
- New Visualization with filters
- Update attribute values 
- Insert Context objects
- Improved code with model and Error handling
Old web-app and External Context SCHEMA updated
Merge branch 'Luca_ContextGUI_Web_v2' into development
First working version of remote trust event subscription and publishing
(related to #1676)
Add CSS Trust Activity Feed
commented testing image
Merge branch 'development' of github.com:societies/SOCIETIES-Platform into development
user agent promotion