One-time PR for Doc Reviews

@croche-okta @wdawson-okta @srinivasanagandla-okta @stsai-okta @lboyette-okta @hoanguyen-okta @karlmcguinness-okta @cwu-okta @tthompson-okta @eklein-okta

Hi team,

Since the material has been pushed to master, this pull request is a little unusual. Please add any comments to the docs here by the end of the day Monday, September 29, 2014. I will make changes and create a new branch and a new PR for the changes. Then, I will discard this PR. 

Please ping me if this doesn't work for you.

Thanks,
Evan
Maybe add a note on Priority Order:
```
Policies and rules are ordered numerically by priority. This priority determines the order in which they are searched for a context match. The highest priority policy has priorityOrder of 1.
Example:
Rule A has priority 1 and applies to RADIUS VPN scenarios
Rule B has priority 2 and applies to ON_NETWORK scenarios

Because Rule A has a higher priority, even though requests are coming from "ON_NETWORK" due to VPN, the action in Rule A will be taken and Rule B will not be evaluated.
```