update bindings for parasail 2.0

[jeffdaily]

Just a heads up that parasail 2.0 is nearly released. Lots of new features, but at the cost of a few backwards-incompatible changes. Notably, you should use getter functions for all result attributes because some attributes are hidden within an opaque pointer. Tracebacks are supported via a new function type, e.g., sw_trace, and using the new parasail_result_get_cigar() function. Perhaps less important is that POWER8 systems are now supported, as well.

Also, I figured out how to use appveyor and travis ci to deploy some of my builds, so if you need access to windows DLLs or a couple mac builds, those binaries will be available as release artifacts.