Added recommended attributes to elphyio spiketrain

Hi,
just added the possibility to read t_start, waveforms and sampling_rate from elphy files in neo format.
I tested it against the old files and a new one, passing the baseio tests.

Thanks for considering the modifications!
No, it was not intentional.
But inside the elphyio test the bug was not rising, that's why the
modification of toddrjen passed unnoticed.

I'm putting it back and committing


On 26 June 2014 18:37, Robert Pröpper <notifications@github.com> wrote:

> In neo/io/elphyio.py:
>
> >              return databytes[start:end]
> >          else :
> > -            return np.array([])
> > +            return []
>
> This seems to reverse 1a5cb05
> <https://github.com/NeuralEnsemble/python-neo/commit/1a5cb0593d8f1b26>,
> is that intentional? Probably a good example why regression tests are
> useful...
>
> —
> Reply to this email directly or view it on GitHub
> <https://github.com/NeuralEnsemble/python-neo/pull/158/files#r14251162>.
>



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