Idaes-pse

This is the 2019 April Release
Changes include:
- Major fixes on control volume 1D
- Improved documentation
- Minor bug fixes
- Ideal property package with smooth VLE transition
- Updated tutorials and interactive jupyter notebooks
- Improved testing
- Dropping support for Python 2.7
- Improvements to referencing components

Initial public release of the IDAES Process Systems Engineering Framework.

[Documentation](https://idaes.github.io/idaes-pse/) | [Install instructions](https://idaes.github.io/idaes-pse/install.html)

The IDAES PSE framework addresses the capability gap between state-of-the-art simulation packages and general algebraic modeling languages (AMLs) by integrating an extensible, equation-oriented process model library within the open-source, DOE-funded, Pyomo AML, which addresses challenges in formulating, manipulating, and solving large, complex, structured optimization problems.

Patch release:
* Improvements to Tutorials

Initial public release of the IDAES Process Systems Engineering Framework.

[Documentation](https://idaes.github.io/idaes-pse/) | [Install instructions](https://idaes.github.io/idaes-pse/install.html)

The IDAES PSE framework addresses the capability gap between state-of-the-art simulation packages and general algebraic modeling languages (AMLs) by integrating an extensible, equation-oriented process model library within the open-source, DOE-funded, Pyomo AML, which addresses challenges in formulating, manipulating, and solving large, complex, structured optimization problems.