Preparing to release bottleneck 1.2.1

[Keith Goodman]

I am getting ready to release bottleneck 1.2.1. This release adds support for NumPy's relaxed strides checking and fixes a few bugs. The only thing left to do is testing.

Please send in test reports. Does bn.test() pass on your computer? Does bn 1.2.1 (the master branch) run with your code that uses bn? Send reports here: https://github.com/kwgoodman/bottleneck/issues/168