rm win32 platform compile code.
Merge pull request #5 from tangbo2013/develop

rm win32 platform compile code.
define CAIRO_NO_MUTEX, modify size_t to xsize_t in cairo-tor22-scan-converter.c, cut -Wincompatible-pointer-types warnnings.
Merge pull request #6 from tangbo2013/develop

define CAIRO_NO_MUTEX, modify size_t to xsize_t in cairo-tor22-scan-conv...
rm sys/time.h cairo-time.c and HAVE_CLOCK_GETTIME macro.
Merge pull request #7 from tangbo2013/develop

rm sys/time.h cairo-time.c and HAVE_CLOCK_GETTIME macro.
fix qt pro
modify xCairo.pro