[web2py] signature field's label should be translatable and _archive.current_record too...

[szimszon]

Hi All!

I think it could be good to have auth.signature. ... .label wrapped with 
T(). And  _archive.current_record too...

Thanks! 

http://code.google.com/p/web2py/issues/detail?id=812
http://code.google.com/p/web2py/issues/detail?id=813