lab1p2 update: adding and fixing various fields

* fixed currPrice (was string, is float)
* fixed dateUrls  (was missing hidden date from bottom of page)
* updated optionQuotes (was missing the 'Date' field)
* factored verifyTable into function
lab1p2 update: implemented sort by 'Open Interest'
lab1p2 update: finalised json dumping
lab1p2 update: code works now!

fixed bug that was cutting off last table row