v0.5

• Support for Python 3 added
• Support for Pyomo 4 added, while maintaining Pyomo 3 support. Upgrading to Pyomo 4 is advised, as support while be dropped with the next release to support new features.
• New feature: maximal power gradient for conversion processes
• Documentation: Buy-Sell Documentation long explanation for Buy and Sell commodity types
• Documentation: Mathematical Documentation full listing of sets, parameter, variables, objective function and constraints in mathematical notation and textual expanation
• Documentation: updated installation notes in README.md
• Plotting: automatic sorting of time series by variance makes it easier to read stacked plots with many technologies