Update changelog for upcoming 1.2 release
Update changelog for upcoming 1.2 release

I think it should be 1.2 instead of 1.1.2, as there have been several major
changes.

I have also added the org moving to the changelog
(https://github.com/gforsyth/doctr/issues/67), since I'm assuming that will
happen soon (a PR will be needed; several places in the code reference
"gforsyth", and we'll probably need a new encrypted deploy key).

gforsyth/doctr_testing,drdoctr/doctr