added Table.update_ids method

@wasade or @ElDeveloper, can one of you review this one? I haven't contributed to biom in a while - let me know if I'm doing anything wrong. The codebase is looking really nice, btw! 
Ah, that could so it though I _think_ I did the last changes and have vim
setup to scrub ws
On Aug 31, 2014 11:05 AM, "Greg Caporaso" <notifications@github.com> wrote:

> In ChangeLog.md:
>
> > @@ -78,10 +80,10 @@ Changes:
> >      been combined into `Table.partition`, which takes an axis argument
> >  * `Table.collapse_samples_by_metadata` and
> >      `Table.collapse_observations_by_metadata` have been combined into
> > -    `Table.collapse`, which now takes an axis argument
> > -* `Table.filter_samples` and `Table.filter_observations` have been combined
> > -    into `Table.filter`, which now takes an axis argument
> > -* `Table.transform_samples` and `Table.transform_observations` have been
> > +    `Table.collapse`, which now takes an axis argument
>
> Is it trailing white spaces? Atom cleans those up.
>
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> <https://github.com/biocore/biom-format/pull/536/files#r16932707>.
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