Update region-manager.jsdoc
Fix typo
Revert "Throw a descriptive error for collectionViews"

This reverts commit 1df40a88f3e34a10cfabd07135669099cbac94bc.
Bump and build v2.2.1
Update upgrade guide to follow semver
Update marionette.functions.md

added item about proxy unbindEntityEvents - 'Marionette.proxyUnbindEntityEvents'
Merge github.com:marionettejs/backbone.marionette
underscore