The next phase of BASIC Wrangler development

It's been awhile, but I'm finally ready to resume development of BASIC Wrangler. The next major version should finally be able to convert from a numbered BASIC listing to a labeled listing. I'm using this as an opportunity to start converting it to use tokenization to process the listings. I thought about using PLY, but I really don't need its parsing capabilities, and so I've decided to use this lexer. After I decided to use that, I realized that I would need lists of BASIC keywords, and so I had to type up a bunch of files of keywords, so I could then process those into regex definitions to feed into the lexer. The current plan is to write the tokenizer to run in three passes: pass 1 to populate a list of all the lines in the listing for a sanity check, pass 2 to find all the jump targets, and pass 3 to replace the jump targets with labels and to reformat the listing.

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