Summary:
Restores the old "pokedex" feature and allows easy definition of new macros.
Only good can come of this!
Critical feature!!
Test Plan:
nyancat
Reviewed By: tuomaspelkonen
Reviewers: aran, bh, tomo, jungejason, tuomaspelkonen
CC: aran, tuomaspelkonen
Differential Revision: 220
