Reverses the deprecation of the pvwatts normalization functions. For details please see the [change log](https://rdtools.readthedocs.io/en/stable/changelog.html).
2.0
2.0.0
2.0.0beta.0
2.0.0alpha.0
Includes minor changes to internal calculations (see 105 and 108). Also introduces plotting functionality, soiling analysis, and the system analysis object-oriented API.