minor string cleanup patches

[Sebastian Spaeth]

A series of 4 patches that allows for nicer ui logging formatting. By
making the str() of Accounts and Repositories be their name, we can
simply say:

log("syncing %s" % repo) 

rather than 

log("syncing %s" % repo.getname())

A minor change that just makes life a bit nicer in the future. Patch series on top of
master

Sebastian
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