Versioning of CSL and the CSL spec

For me, yes.

But we obviously need new input from @Sebastian_Karcher and @Rintze_Zelle1.

In this model, we would just submit PRs against master, and keep version number constant, and the decisions would be how to sequence the merges and when to tag a 1.0.x version.

So logically, merge the low-hanging fruit of the straightforward variable and item type changes first, tag 1.0.2, then intext and tag 1.0.3.

Then do the same with docs, etc.