Support serviceaccounts

[sebgoa]

Without them DNS addon won't work (and lots of other things as well)
It is not an issue if we keep relying on weave in localkube.

[luxas]

ServiceAccount should be present.
Weave should not be a dep, we'll manage without it

[dlorenc]

This is how hyperkube sets up service accounts:
https://github.com/kubernetes/kubernetes/blob/master/cluster/images/hyperkube/setup-files.sh

They generate tokens using urandom and pass them into the api server via --token-auth-file

[luxas]

Yes, we're using easyrsa for certificate creation
However, when we have go, we should do something like this: redspread/localkube#50

[dlorenc]

This should be working now with #48.