Don't return `true` from view classes' render() method.

It cause's Controller:render() to set the response body as `true`.

Refs #2780
Merge pull request #2785 from ADmad/2.4-view-return-value

Don't return `true` from view classes' render() method.
Merge pull request #2782 from jimmymadon/feature-clarify-acl-errors

Clarified ACL node lookup failed error.
Add additional tests for various iterators.

Expand documentation and tests for iterators.
Update docs.
Minor documentation corrections about Router::connect().
Minor comments only. Added more explanation of $defaults parameter to Router::connect(). Trying to clarify how it relates to the routing destination and the template string tokens.
Merge pull request #2786 from sam-at-github/master

Router::comment() documentation
Fixes ApiGen doc blocks
Fixes spaces
Fixing doc block indentation
Fix spaces
Merge pull request #2789 from rockingeric/3.0

3.0 - Fix more doc blocks errors
Fixed docblocks. Refs #2677
More docblock fixes.
Expand tests and remove unreachable code.
Add coverage for no entity.
Add additional test coverage.
Fix ApiGen errors
Merge pull request #2792 from rockingeric/fixer

Fix ApiGen errors