Move script version to separate file.

Bump version to 3.0.0-beta1

Merge release 2.3.0 branch 'tools-develop'

Merge release 2.2.1 branch 'tools-develop'

Merge release 2.2.0 branch 'tools-develop'

Merge release 2.0.1 branch 'tools-develop'

Merge release 2.0.0 branch 'tools-develop'

Merge release 1.3.1 branch 'tools-develop'

Merge release 1.3.0 branch 'tools-develop'

Merge release 1.2.2 branch 'tools-develop'