Revisit identifiers spec

Partially addresses #1135.

This is the result of discussions in the past few days about imprecision and confusion. Hopefully simpler. There are a few FIXME comments in the doc - discuss.
new draft up, in a new commit for rollback if needed.  Still one FIXME:
@smarterclayton


On Tue, Sep 9, 2014 at 9:30 AM, Tim Hockin <thockin@google.com> wrote:

> I am going to take a stab at splitting pod-specific stuff into a "case
> study" section.  Watch this space.
>
>
> On Tue, Sep 9, 2014 at 8:51 AM, bgrant0607 <notifications@github.com>
> wrote:
>
>> In docs/identifiers.md:
>>
>> >
>> > -10) Each run of a container within a pod will be assigned a ContainerAttemptID (string) that is unique across time.
>> > -   1) This corresponds to Docker container IDs
>> > +7) Each run of a container within a pod will be assigned an AttemptID (string) that is unique across time.
>>
>> LGTM, except I'd add a FIXME/TODO for whether AttemptID will always equal
>> Docker ID.
>>
>> FWIW, it looks like there is no longer a # 5, but I don't think that
>> matters for the formatted text.
>>
>> --
>> Reply to this email directly or view it on GitHub
>> <https://github.com/GoogleCloudPlatform/kubernetes/pull/1216/files#r17309473>
>> .
>>
>
>