[WIP] trying to install ImageMagick6.8.5 with libwebp0.4.0-4
Merge branch 'master' of ssh://github.com/wantedly/nginx-image-server into imagemagick-6.8.5
Fix download url
Add --libdir to configure option
Merge pull request #10 from wantedly/imagemagick-6.8.5

Use Imagemagick 6.8.5