Upgrade to vuetify1.0 / login error message

closes #65 (closed) closes #59 (closed)

@j.michal does this look good to you?

mentioned in commit 2b65baba

merged

It does, notwithstanding that it’s too late for proper review since it has already been merged ;-)

I wanted to start working on the layout/navigation with Vue1.0. Next time, instead of dirctly merging myself, i'll either wait or just branch manually from where the changes are that i need (didn't think of this and branched from master )