Fix buffering implementation link 

Previously was linked to a line off master, where the line numbers change
Merge pull request #2120 from paulfalgout/patch-2

Fix buffering implementation link
Wiki link removed

The wiki no longer exists, so there's no where for this link to go.
Merge pull request #2125 from paulfalgout/patch-3

Wiki link removed
#2127: Explicitly mention that collections are not passed to the template context in composite views
Merge pull request #2132 from adamboduch/master

#2127: Explicitly mention that collections are not passed to the templat...
Adds helper methods to AppRouter.
region._ensureViewIsIntact

Having the region check for view.isDestroyed does two things:

1. It allows you to handle the error of a region.show without the region killing the currentView and breaking without recourse.

2. appending isDestroyed to a Backbone.View on region empty adds the same safety for not re-showing a removed backbone view.
Improves Application triggerMethod arguments.
Update param types for addRegion method
Removes unnecessary emptyRegions call in LayoutView.
Updates file names; remove unnecessary files.
Update region-manager.jsdoc
Uses on instead of listenTo for the view show callback.
Improve undefined region show message.

Fixes #1913
adding item-view.jsdoc... again
Add auto addRegions behavior to regionMananger

fixes #1902
fix indentation for destroy method for proper JSON output :neckbeard:
Aliases Marionette as Mn
Updates Module documentation.