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Add J and K to navigate between listed gems #410
Just as Google Reader and many other apps, use J to move the selection down, K to move the selection up and press enter to go to the page of the gem.
I would've liked to write unit tests for this, but there is nothing setup for this. Maybe time to use the asset pipeline and throw in something like Jasmine/evergreen?
PS. There is a lot of commented out code in