Functional TPCL Editor

So. I got the GUI working. All of the stuff in the screenshot was put in with mouseclicks. The progression was:

(lambda (design) *EXPR*)
-> (lambda (design) (if *BOOL* *EXPR* *EXPR*))
--> (lambda (design) (if (= *VAL* *VAL*) *EXPR* *EXPR*))
---> -> (lambda (design) (if (= *VAL* *VAL*) #t *EXPR*))

And I got the TpclExpression class to the point where it actually functions pretty well. Expressions can be inserted and removed from other expressions which is basically what I've been aiming for. This will remove the human error of hand coding and make a large database of premade code snippets available (at least, that's the hope).

So now that I know the system works I just need to make sure that it's basically what mithro, nash and llnz wanted out of this and then I can start moving forward with introducing nice formatting to the expressions and expanding on the database of TPCL code.

I had originally planned to attempt to limit the types of expressions that could be nested inside of others. But that's just silly. It will introduce more problems than it's worth, I think. At most pointers can be added that help a ruleset designer make smart choices.

-Fro