Initial release of libvysmaw

This marks the initial release of libvysmaw, and the start of disciplined (we hope) version numbering. In addition to providing certain library API guarantees, version numbering will promote compatibility of vys producers and consumers by being tied to versions of the vys protocol. In fact, libvysmaw1.0.0 includes an update to the vys protocol relative to other recent libvysmaw development versions, which under strict versioning would necessitate a change to the major version number of libvysmaw, making this a good point to start doing that.