Update beck-online.js

1. beck-online.js
Added support for beck-online "Leitsatzkartei" LSK (database of leading records), i.e. scraping of articles where beck-online does not have the article itself but only information about the article

2. juris
Added new translator for the German legal database Juris.
Okay. Got it to work now using single backslash. Tnx. 
Juris does not always use https, therefore we should allow both http and https.