Figure out some way of having predefined or persistent variables

[evinism]

As a user, I always want to define t, f, 0, 1, 2, 3, 4, S ... a whole bunch of other things. Right now on reload, the execution context is destroyed.

this is primarily a user interface problem-- persisting the variables cross session's dead easy, it's just presenting that to the user what's defined that's the issue.