Add new translator Semantics Online Bibliographies.js

This translator can handle two websites:
 * BLLDB = online version of the  Bibliography of Linguistic Literature (BLL)
 * BDSL = online version of the Bibliographie der deutschen Sprach- und Literaturwissenschaft

see #811, which are avaialable in German and English.

Some remarks:
 * The test cases are only working if you replace the `vid` parameter with a current session key.
 * I feel that all information from the classification and so on are just too much to add everything as tags. Moreover, I have no idea how to restrict to not more than 10 good tags. Thus, I don't add any tags, but everything should be searchable in the snapshot.
Hm... does not seem to work. I tried
```
		"type": "web",
		"url": "http://www.blldb-online.de/blldb/suche/Titelaufnahme.xml?vid=BD011526-85E3-4887-BDCD-78051196E87A&erg=NaN&Anzeige=10&Sprache=de&contenttype=text/html&Skript=titelaufnahme&Publikation_ID=300346700",
		"defer": true,
		"items": [
```