Version renumbering

Last version released was 1.0.100a. Next version will be 1.11

At some point I messed badly with version numbering so I've decided to fix the mess a bit. Essentially, each new release will bump the minor (x.Y.z) version while bugfix only releases will bump the micro (x.y.Z) version. I'll also drop the a and b suffixes and just state at release time how experimental they are, since I don't follow any alpha/beta stages.

Here's the table of how the previous versions should have been numbered. I won't be renaming/renumbering them, only future versions will follow this numbering.