Release 1.0

[nickbabcock]

I've not needed any new features or API changes in over a year (coming on two), if this continues for another 6 months, I will cut the current version (0.6.2) as (1.0).

There are nice to haves like the IO adapter, but since I don't personally need this feature I've not taken this feature to the finish line. I don't suspect it'd be a breaking change anyways.

Other tasks like exploring removing unsafe (#23) and transitioning away from basing everything on a large macro won't cause any API or behavior changes and can be done after 1.0