add FFI declarations for SDL and linux input events
add FFI interfacing for SDL (input, graphics)
Merge remote-tracking branch 'upstream/master' into ffi-experiments
Merge branch 'master' into ffi-experiments
fix buggy C-style comparison of integer value

in Lua land, "if 0 then X end" does execute X.
Merge pull request #65 from hwhw/fix-blitbuffer

fix buggy C-style comparison of integer value
fix typo in blitbuffer ffi module
Merge pull request #66 from chrox/master

fix typo in blitbuffer ffi module
fix bg- and fgcolor support in freetype ffi module
Merge pull request #67 from chrox/master

fix bg- and fgcolor support in freetype ffi module
fix hyphens detection when reflowing pdf/djvu pages
Merge pull request #68 from chrox/master

fix hyphens detection when reflowing pdf/djvu pages
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'origin/ffi-experiments'