Switching to libsbt's state wrapper.
A messy first attempt at shunting code over to libsbt.
Successfully offloaded some code to libsbt.

Removed the settings.dump file from the repository, it's
unacceptable to have building dirty the repo. However it will
come back in some form becaues it's tremendously useful to
be able to refer to the settings at any given commit.
Offloaded a bunch more code to libsbt.

Now embarking on testing against libsbt 0.3.1-M6.
More libsbt integration.