Log Message:
Update to 1.6:

List of changes in MuPDF 1.6

* Features:
	* Color detection device (mudraw -T).
	* Sepia mode full-page color tinting in X11 and win32 viewer (keybinding: shift-C).
	* Re-implement printf and strtod due to portability issue with locales and \ 
number formatting.
	* Add 'gsview' project: a Windows Modern UI viewer.
	* Improve XML parser interface.
* Bug fixes:
	* CBZ page ordering
	* ZIP64 support
	* iOS and Android bug fixes
	* Miscellaneous minor fixes