Post-branch version bump
More work on fixing caret navigation support for Gecko content
* Word navigation should be working as expected
* Line navigation should be improved wrt reliability
* Performance should be improved
* Diagnostic messages regarding broken aspects of Gecko's AtkText support
  added to debugging output

Important: This is still 1000 different kinds of unstable. I've already
branched for 3.14. Choose your branch wisely. :)