Updates the planning doc.
Updates the planning doc.

ashfurrow/RXCollections,robrix/Lagrangian,ashfurrow/RXCollections,robrix/RXCollections,robrix/Lagrangian,robrix/Lagrangian,robrix/RXCollections,robrix/RXCollections,policp/RXCollections,policp/RXCollections,policp/RXCollections