Remove test handled by backbone.babysitter

This test essentially duplicates a test in babysitter.  It may have been meant to test something else before, but it doesn't seem useful today.
Test for childViews added at an existing index

should cover
https://coveralls.io/files/369411688#L296
and
https://coveralls.io/files/369411688#L419
:100:% test coverage of serialize data
Exclude generated coverage files in .gitignore
fix(test): add consistency about named spy

Use this.showSpy for `expect(this.showSpy)` instead of
`expect(this.myRegion.onShow)`.

Just doing the same thing as this.swapSpy.
feat(region): pass the option to the trigger events

 * pass view, region, options to any triggers
 * add test for region show triggers
 * add documentation about new arguments for region show events
Merge pull request #2096 from paulfalgout/collectionview-child-insert-before-test

Test for childViews added at an existing index
Merge pull request #2098 from megawac/ignore

Exclude generated coverage files in .gitignore
Merge pull request #2095 from paulfalgout/remove-unnecessary-spec

Remove test handled by backbone.babysitter
Remove deleted test from SpecRunner

I removed the test in
https://github.com/marionettejs/backbone.marionette/pull/2095

But I didn't remove it from the SpecRunner.html file :cry:
Merge pull request #2099 from paulfalgout/remove-unnecessary-spec

Remove deleted test from SpecRunner
Merge pull request #2066 from stephanebachelier/region-trigger-options

Region triggerMethod options
Merge pull request #2097 from megawac/serializeData

100% test coverage of serialize data
CompositeView comment cleanup

serializeData is only responsible for the model not the collection.

render hasn't prevented the re-render of the collection in a very long time.
Merge pull request #2103 from paulfalgout/composite-serializeData-documentation

CompositeView comment cleanup
[api] rename api file to yaml extension
Merge pull request #2104 from jasonLaster/jsdoc-yaml

[api] rename api file to yaml extension