Add disclaimer to README, update license year

Author: robbievanleeuwen

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2020 Robbie van Leeuwen
+Copyright (c) 2021 Robbie van Leeuwen
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.md

@@ -102,3 +102,7 @@ $ pip install sectionproperties
 - [ ] Optimisation
 - [ ] Reinforced Concrete
 - [ ] Steel
+
+## Disclaimer:
+
+*sectionproperties* is an open source engineering tool that continues to benefit from the collaboration of many contributors. Although efforts have been made to ensure the that relevant engineering theories have been correctly implemented, it remains the user's responsibility to confirm and accept the output. Refer to the [license](LICENSE) for clarification of the conditions of use.

README_pypi.rst

@@ -137,6 +137,16 @@ Additional Modules:
 -  [ ] Reinforced Concrete
 -  [ ] Steel
 
+
+## Disclaimer:
+--------------
+
+*sectionproperties* is an open source engineering tool that continues to benefit from the
+collaboration of many contributors. Although efforts have been made to ensure the that relevant
+engineering theories have been correctly implemented, it remains the user's responsibility to
+confirm and accept the output. Refer to the license for clarification of the conditions
+of use.
+
 .. _Subscribe: http://eepurl.com/dMMUeg
 .. _documentation: https://sectionproperties.readthedocs.io/
 .. _installation wheel: https://www.lfd.uci.edu/~gohlke/pythonlibs/#meshpy

docs/source/index.rst

@@ -70,6 +70,14 @@ tracker using one of the `issue templates
 If you have a request for a feature to be added to the *sectionproperties* package,
 please don't hesitate to get in touch
 
+Disclaimer
+----------
+
+*sectionproperties* is an open source engineering tool that continues to benefit from the
+collaboration of many contributors. Although efforts have been made to ensure the that relevant
+engineering theories have been correctly implemented, it remains the user's responsibility to
+confirm and accept the output.
+
 License
 -------