add ffi declarations for zframe and zsocket in czmq
Merge pull request #224 from chrox/master

add ffi declarations for zframe and zsocket in czmq
add win32 target for koreader-base
use portable util.gettime
make sleep, gettime, realpath functions in util portable
reflect different names of dynamic libraries on different platforms
remove unused patches in kpvcrlib
update README.md
fix building win32 target
Merge pull request #225 from chrox/master

add win32 target for koreader-base