OpenSlide 3.3.3 released

[Benjamin Gilbert]

Hi,

OpenSlide 3.3.3 has been released.  It fixes inclusion of openslide.h 
with MSVC and adds minor compatibility improvements for Aperio JP2K and 
Hamamatsu slides.

Windows build 20130413 also fixes a runtime crash when linked with /OPT:REF.

As usual, they're at:

     http://openslide.org/download

Thanks,
--Benjamin Gilbert