Merge pull request kyamagu#232 from amroamroamro/cv310

followup fixes to PR#231

Merge pull request kyamagu#216 from amroamroamro/appveyor_ci

continuous integration using AppVeyor

Merge pull request kyamagu#145 from mljli/master

fix CV_LDFLAGS for Arch Linux

Merge branch 'v2.4'

OpenCV 2.4.0 compatible