fix broken commands/reqres doc links + condense

since these were merged into marionette.application.md in 29faee228e7983d677175d6c15cb76d7116cbc0b, it seemed appropriate to just condense it. also the links are currently broken. can revert back the former if necessary.
Merge pull request #1116 from moimikey/master

fix broken commands/reqres doc links + condense
Separate child view triggers specs to allow for finer control and better testing.
Allow CollectionView to proxy close events, (#1101)