After a long period of no major Development-grade changes, I have finally released a new development branch. The primary new feature in this branch will be support for split transactions; as of 184.108.40.206, there is support in the model and the Plugin APIs for splits, but the GUI does not support it yet. This should be added in 220.127.116.11 or 18.104.22.168 if all goes well.
In addition to split transaction support, there are numerous minor tweaks and bug fixes. Please look at the changelog for details.