Updated lltjp-listing.sty

Updated lltjp-listing.sty

 * Fix a bug that unnecessary empty line is printed
   if there are more than one Japanese characters
   before ``the first line'' of \lstinputlisting.

 * Changed treatment of variation selector
   I only considered VS17--VS255 (U+E0100--UE01EF) now,
   but it is easy to extend to VS1--VS16.

 * Introduced two new keys: vsraw or vscmd
   to control how VS is printed

 * Moved Variation Selectros Supplement (VS17--VS255)
   to the character range 6. Hence they are treated as JAchars.