Log Message:
Update 1.97 o 1.98
Version 1.98, July 4, 2014
==========================
 o fixed escaping of character & in URLs
 o fixed translation of -- and --- (contributed by Gabriel Scherer)
 o more macros: \dj \DJ (contributed by Domenico Bianculli)
 o \textsuperscript
 o temporary files are now created in the current directory
   to avoid bibtex error "Not writing to ... (openout_any = p)."
 o fixed a bug with non-ascii characters in php-output