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 don't think ISSNs are reused.

http://www.issn.org/wp-content/uploads/2013/09/ISSNManual2012-GBR2.pdf
e.g. "The ISSN on the deleted records should not be re-assigned to another title. The ISSN may be re-used only if the ISSN record was, by mistake, deleted. "