Update CKAN.schema

Adds the WTFPL license in.
Added WTFPL to human readable spec.

For #429.
Fix OSX changes in build.lean

These somehow got into build, which meant my helpers kept trying to undo
them.
Merge remote-tracking branch 'origin/master' into ksp_versions

Fixes change where build rather than build.lean got updated in
a previous commit.

* origin/master:
  Fix OSX changes in build.lean
  Added WTFPL to human readable spec.
  Update CKAN.schema

Conflicts:
	bin/build