Pin conda-build to 3.16 to avoid (https://github.com/conda/conda-build/issues/3289), see beat/beat.core!43

Help CMAKE find MacOS SDKs from arbitrary locations

Closes bob.learn.boosting#2

See merge request !116

[conda_build_config] update bob- and beat-devel

Closes bob.nightlies#42

See merge request !115

This reverts commit 3092d17c.

This reverts commit d5ea0805.

Add missing packages to release script

See merge request !113

Fixes issues #104 and #105

Closes #104 and #105

See merge request !111

Enable boost 1.67.0 builds as well

See merge request !112

This reverts commit 05e95a8f.

This reverts commit a3de0f48.

These variables will be exposed during build time.
They might mask the binaries of these packages
which will cause the build scripts not to find the
binary files.

Skip packages which are not supposed to be built for a given arch; Be more verbose (still on issue #100)

Needed for bob.pad.base!55