Makes partial helper only lookup the deprecated template name if the first try is unsuccessful.
Document and add assertion reflecting that helpers created with registerBoundHelper don't support invocation with Handlebars blocks.

Fixes #2655
Merge pull request #2659 from lukemelia/bound-helper-clarity

Document that registerBoundHelper doesn't support blocks
Merge pull request #2644 from jayphelps/master

Makes partial helper only lookup the deprecated template name if the first try is unsuccessful.
Remove unnecessary reference

`Error.prototype.constructor` returns `Error`.
Remove unnecessary yuidoc markup

The comments begining with `/**` is parsed as yuidoc.
These comments has no yuidoc markup.
Merge pull request #2661 from tricknotes/remove-unnecessary-reference

Remove unnecessary reference
Merge pull request #2662 from tricknotes/remove-unnecessary-yuidoc-comment

Remove unnecessary yuidoc markup
typo
Merge pull request #2665 from gilesbowkett/action_handler_documentation_typo

typo
typo fix.
Merge pull request #2668 from speedmanly/typo-fix

typo fix.
Add assertion about setting the same current view to multiple container views
Merge pull request #2670 from teddyzeenny/container-view-assertion

Add assertion about setting the same current view to multiple container views