recover numpy.ndarray alignment after transmisson

[Beronx86]

After transformation by start_server and DataServerStream, the numpy.ndarray may become unaligned.

[abergeron]

That will introduce a copy which is bad for performance.

[bartvm]

I guess you could do data = [a if a.flags.aligned else numpy.require(a, requirements='A') for a in data]?

[abergeron]

Or you could use copy=False which avoids the problem entirely.

[rizar]

@bartvm , I checked, it works.