Add support for handling ndarrays with dtype='O' using pickle (as wel…

…l as cautionary note) (#46)

Bump version.

Bump version.

Bump release.

Add unit test to ensure that fix for #35 works.

Fix regression handling non-contiguous arrays (#34).

Fix #31 and #32, check Py version before defining encode/tostr funcs.

Make copyless functionality default.

Add Py3 classifiers (#29).

Tweak.