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.
Sorry, but it definitely does not work for me. In Scaffold, test RegEx returns false and FireFox does not recognize the site anymore. I am using Firefox 33 and Scaffold 3.0.