[Improvement] Model Provisions 0.5 - move non-core section to Risk Grid

[shanecoughlan]

This is an open issue for:
https://github.com/OpenChain-Project/Reference-Material/blob/master/Adoption-Preparation/Model-Provisions/openchain-standards-model-provisions.0.5.md

The suggestion is to move the "Below is a Series of Optional Model Language Issues in Original Risk Grid Format" section to the Risk Grid (which also needs to be reformatted into a table):
https://github.com/OpenChain-Project/Reference-Material/tree/master/General-Compliance-Support-Material/Risk-Grid

[shanecoughlan]

Done with Risk Grid updated to version 13:
https://github.com/OpenChain-Project/Reference-Material/blob/master/General-Compliance-Support-Material/Risk-Grid/risk-grid-13.md

[shanecoughlan]

Please note: the Risk Grid will be the next major document to get reformed and reformatted once the core model provision document is formally published.