Update README.md

Lee Richmond · Lee Richmond · commit 2cd44a905104 · 2016-09-01T09:31:36.000-04:00
diff --git a/README.md b/README.md
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 # Ember-data-extensions
 
 View [official documentation](https://bbgithub.dev.bloomberg.com/pages/InfrastructureExperience/ember-data-extensions)
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+This is a collection of helpers/customizations to ember-data to make it work for our use cases. For example, nested JSONAPI relations for forms like this:
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+![form](https://bbgithub.dev.bloomberg.com/storage/user/3/files/af70f08e-7026-11e6-8c18-f26e2d1a27c5)
