Support "Probe Words"

[samanthamccabe]

Associate "probe words" with handles, and allow user to assert that a given probe word will have a particular state at some point in the script. If it does not, optionally quit and write out debug files for any lexicons loaded into memory

The intention is to do something like:

probe:  "foo" as BAR
% rules here
assert: BAR is "høø"

and to produce debug output if the probe is wrong. This should help the user ensure that their rules have the intended outputs.