[Idea] Alternative order of the RBAC cascade

[recmo]

This is an idea, we give local/global a priority over everyone/specific. It's an alternative to the current order.

I'm sure one of these orders makes way more sense that the other. But I don't know which one. So I'm posting this PR to discuss.

[codecov]

Codecov Report

Merging #62 into master will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master      #62   +/-   ##
=======================================
  Coverage   74.33%   74.33%           
=======================================
  Files          40       40           
  Lines         861      861           
  Branches      177      177           
=======================================
  Hits          640      640           
  Misses        221      221

Impacted Files	Coverage Δ
contracts/AccessControl/RoleBasedAccessControl.sol	67.85% <100%> (ø)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update b69f987...ce9c27a. Read the comment docs.