Summary: This is some documentation I've taken while studying the `Takeover.*` classes. It could be helpful to live in this folder for future reference. If I missed anything or misrepresented anything, please let me know! I plan to keep this updated as changes are made to files in this folder.
Reviewed By: simpkins
Differential Revision: D18868291
fbshipit-source-id: 8fc65dd3dd6f1b5bcc344b5f4c2b5b9ceb11ed17
