Merge pull request #200 from akkie/master

Fix typo
Merge pull request #201 from akkie/master

Fix typo
Adapt the documentation to the master snapshot
Merge pull request #202 from akkie/doc

Adapt the documentation to the master snapshot
Added Gitter badge
Merge pull request #203 from gitter-badger/gitter-badge

Add a Gitter chat badge to README.md
Authenticator rewrite