Fixed Multi-user system
Merge branch 'dev' of https://github.com/wallabag/wallabag into dev
Added multi-user functionnality in all themes
Fix #657 and postgresql problems
Added default statement for db system
Fix for #664 - Missing source url attribute in RSS feeds
Merge pull request #665 from mariroz/dev

fix of rss headers problem
fix of putenv warning under safe mode, issue #646