Add new style for JITE

... JITE = Journal of Institutional and Theoretical Economics.

 * English style by German publisher
 * This style looks quite similar to the Chicago Manuals Style, but they don't mention anything in their style guide.
 * Update finanzarchiv.csl: Add pages in chapter/inproceeding (forgot before #1115)
I have the information form the "Zeitschriftendatenbank": http://dispatch.opac.dnb.de/DB=1.1/SET=1/TTL=2/CMD?ACT=SRCHA&IKT=8&SRT=LST_ty&TRM=0044-2550 (if the deep link does not work try to search for the ISSN here http://dispatch.opac.dnb.de/LNG=EN/DB=1.1/)

My interpretation of the data is: The journal exists for about 170 years and during that time it changed name and ISSN for whatever reasons (e.g. marketing). Thus, the information should not be wrong but maybe it is not worth to mention it.

Let me know what you think. I can delete it if you want.