The crate can be build by running `make VST_INCLUDE_DIR=/path/to/sdk` .

Including ctest to generate tests for those bindings is blocked by this
issue: https://github.com/alexcrichton/ctest/issues/23

The build.rs script requires to pass the location of the VST-SDK at the
moment. I am pretty sure that neither pkgconfig, nor the equivalents
will find the SDK because it is often extracted somewhere below the
users home directory  and not installed through a package manager.