Fix Byns Bistro Parser

[rebasar]

Byns Bistro changed their menu style and the URL. As a result, the current parser is failing. Fix it.

URL for the new menu can be found at: https://www.bynsbistro.se/menyer

[rebasar]

I won't fix this. Instead I will be removing Byns Bistro parser completely. The reason for that is that it just requires too much effort to implement, and I am not really in the mood. I'll leave the issue open, in case somebody (maybe even me) wants to fix it in the future. Here are the steps for parsing, if anyone comes up with a decent implementation:

• Fetch the menu page
• Parse the menu page, and in a specific script element, find a Javascript object which holds the configuration
• From the configuration object, extract the URL for the actual page contents
• Fetch the URL (which will be a JSON object)
• Inside that JSON object, try to find the dataItem with type StyledText
• From the candidate objects, find the one that contains the HTML for the main content
• Parse the HTML to extract the actual information

An alternative method might be using something like Selenium to get the final DOM tree directly but it is not viable, considering it will introduce a hue dependency and the current server is rather resource limited.