Add Odin, the Allfather

Well, properly Óðinn :)
work on Óðinn
GUI work on Óðinn
More work on the Alföðr
Bug fixes

Fix bug where Grapher widget would be unaccessible outside of the `gui`
function.

Fix bug where GUI dictionaries (v/w/f) would not resolve as desired.
See the appropriate heading for details.
Typo
Pull all resources into Odin and clean workspace
Merge from master
Tangle
Add tests
Fix testing section

I need to be more careful about which changes I make on which branch if
I have any hope at all of this system working.