Add common solution for $parse:isecdom

Request Type: docs

How to reproduce: 

Component(s): $parse

Impact: small

Complexity: small

This issue is related to: 

**Detailed Description:**

Commonly this error happen when returning a value in an ng-click handler.

And especially with CoffeScript that returns the last lines.

**Other Comments:**

It's sad that there is no more comments on the docs, because that's the place this kind of things would be.

If you google it, most people have the same issue:

https://groups.google.com/forum/#!msg/angular/bsTbZ86WAY4/hh_319IrmFoJ
http://stackoverflow.com/questions/23838497/coffeescript-referencing-dom-nodes-in-angular-expressions-is-disallowed
http://jorshasaur.us/referencing-dom-nodes-in-angular-expressions-is-disallowed/
It seems like the confusion only happens when using CoffeeScript.
How about having a `CoffeeScript` section that explains stuff more specifically for that language, with the solution of an explicit `return` highlighted