[MERGE] Implement reference command

[Aaron Bentley]

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Jelmer Vernooij wrote:
> Aaron Bentley wrote:
>> +# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
>> +
>> +from bzrlib import (
>> +    branch as _mod_branch,
>> +    bzrdir,
>> +    )
>> +from bzrlib.tests import TestCaseWithTransport
>> +
>> +class TestReference(TestCaseWithTransport):
> 
> ^^ Doesn't this need two empty lines ?

Fixed and submitted.

> Is there a specific reason why you're using '1.9' + Branch8 rather than
> 'development-subtree' ?

development-subtree doesn't use Branch8.  I didn't want to put Branch8
in a UI-visible metaformat until I thought support was good.

Aaron
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