Bring the memes!

Now supports the following memes:

* brian
* scumbag_steve
* grumpy_cat
* first_world_problem
* stoner
* good_guy
* morpheus
* all_the_things
* prepare_yourself
* yo_dawg
* what_if
* i_dont_always
* skeptical
* joseph
* oag
* trollface
* insanity_wolf