Fix HTMLSerializer on Py2 shouldn't assert unicode strings.

Also release 0.9999999 as 1.0b8.

Prep for 0.9999999 release.

Also release as 1.0b7.

Bump verison to release.

Keep up with maintaining 1.0bX duplicates of 0.99-series

Hi 0.99999!

Also release 0.9999 as 1.0b5 to keep --pre happy.

Hi 0.9999, at last!

Drop -dev from version number for release