Update marionette.configuration.md

Changed the 'o' character and first 'e' character in `Marionette.$` because it appeared to be rendering weirdly.
updated collectionview docs to reference correct event callbacks
Fixed type in ItemView doc
Fixed 'item:rendered' and 'item:closed' event names.

The documented event names do not match the actual event names triggered.
Fixed typo from 'onItemBeforeRemder' to 'onItemBeforeRender'
use the correct its
use the correct "its" throughout the docs
Merge pull request #589 from Jon-Biz/master

Fixed CollectionView doc reference to former OnItemAdded event callback
Merge pull request #591 from clatour/patch-1

Update marionette.configuration.md
Merge pull request #592 from rutkovsky/patch-1

Fixed typo in ItemView doc
Merge pull request #594 from lshearer/patch-1

Fixed 'item:rendered' and 'item:closed' event names.
Merge pull request #606 from kzhaokol/patch-1

Fixed typo from 'onItemBeforeRemder' to 'onItemBeforeRender'
Merge pull request #610 from garrison/master

use the correct "its"