Show unread count in the document title

Conflicts:
	public/js/selfoss-base.js
Merge pull request #548 from MTGap/unread-count

Show unread count in the document title
set new version
Merge pull request #551 from jtojnar/master

add titles to buttons
update README.md
Merge branch 'master' of github.com:SSilence/selfoss
update README.md