Generalize HTML parsing logic to accommodate any URL

[joebonneau]

The initial plan was to just focus on select websites for compatibility, but I think it's clear that I should just rework the parsing logic entirely to make it more generalized.

Many websites have separate HTML elements for the various components of a recipe line item, but the ones that don't are going to be an issue. I think it might work out better and have less convoluted logic to instead use regular expressions to parse this information out, no matter the website.