Fix Metamorph error

Handlebars expressions cannot be enclosed in HTML
comments
Redirect to index when not connected to remoteStorage

All routes that require to be connected to remoteStorage, can be
extended from `Sharesome.ConnectedRoute`. Users that are not connected
yet, will be redirected to the index.
No need to use an extra view to set the active nav element
Merge pull request #3 from galfert/improvements

Some small improvements