v1.3.0

The purpose of this release is to introduce the math nodes expression language Python package.
Expressions can be used to describe a series of mathematical operations inline, which can then be interpreted to generate a math node network for you.

For more details on the expression language and its usage please refer to the new User Documentation.

Note that while this version had limited production testing, since no new nodes were added in this release, it should be fine to deploy in production.