Bibtex import translator is now called instead

* Bibtex import translator is now called internally (this deals with all kind of character encoding problems as well as spacing problems)
* every entry types is handled now by just checking if the class "entry" is contained in the list of all classes
* detectWeb is (for creating the right symbols) updated
* cases where DBLP uses crossref fields and links for example an inproceeding to the proceeding (second entry) is dealt and the information of it is used as well
* replace BibTeX field "ee" (DBLP) which is normally named "url"