- Update `graphics/embree' to version 2.11.0
- GC patches (all of them got integrated upstream)
- Rename IMAGE_MAGICK option to a standard IMAGEMAGICK, but keep custom description which is more specific and follows internal one
Because GitHub releases (tarballs) are not fetched with correct modification
time, set TIMESTAMP to 1472729819 which corresponds to commit aa318b0 tagged
as this release.