"Co-located branches" by convention

[Ian Clatworthy]

Gordon Tyler wrote:
> Neil Martinsen-Burrell wrote:
>> Brownie points to the first person with a patch to support
>> .bzrmeta/ignore :)
> 
> I'm a sucker for punishment, so I'm poking at this. :)

Excellent. Basically:

1. just look for .bzrmeta and fall back to .bzrignore if it's not there.
2. Change 'bzr ignore' to create .bzrmeta/ignore as the preferred place.

Ian C.