Allow options to be passed to the regionType when building a custom region

Adds test coverage
Merge pull request #803 from dakota/patch-1

Allow options to be passed to the regionType when building a custom region
Include ignore for IntelliJ based IDEs
Merge pull request #864 from andrewhubbs/patch-1

Include ignore for IntelliJ based IDEs
fixes collectionView buffer bug
* Fixes #865
* Trigger itemView.onShow in appendBuffer
* Fix bug in collectionView.spec
Merge pull request #866 from parklet/collectionview-show-events

Trigger itemView.onShow in appendBuffer if collectionView is already shown
v1.5.1 bump and build
Fix markdown problem in changelog.md
Merge pull request #868 from dmytroyarmak/patch-1

Fix markdown problem in changelog.md
* Add composite:collection:before:render event
Merge pull request #867 from parklet/composite-collection-before-render

Add composite:collection:before:render event (with test)