Fixed #510: Browse by Tag + album or Artist not only with songs result
Translation and database-words.txt update

Database-words.txt updated and reorganized for better and faster string
identification based on the option-ids in the database.
Also updated Ger and Fr translation.
+ update related to a suggestion by @arnaudbey
+ corrected some sentences
Merge pull request #531 from Psy-Virus/develop

Translation and database-words.txt update
Disable playlist import on catalog update by default (fix #533)
Fixed #534: Delete playlist action not handled / ajax