Bump to 0.15.1.2, update changelog.

Bump to 0.15.1.1, update changelog

Bump to 0.15.0.1 and update changelog.

Update cabal description, removing talk of export.

Use stock pandoc 2.14.1.

Add Paths_gitit to autogen-modules

Makefile - use cabal-v2.

Note on highlighting changes.

Bump version to 0.12.2.1, update CHANGES

Update CHANGES.