[Merge] lp:~kai-mast/friends/upstart2 into lp:friends

[Kai Mast]

One more thing :D We could also do logging via upstart. Basically friends just has to output to stdout/stderr and everything will end up in ~/.cache/upstart/friends.log

Maybe this could eliminate some logging code. 
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https://code.launchpad.net/~kai-mast/friends/upstart2/+merge/199361
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