packetizing, 1to1 connections, reconnections

[jackflips]

[chrisballinger]

@jackflips Hey finally got a chance to check out this code, sorry about the wait! The main issue preventing me from merging is the leakage of application state into the data models via the use of singletons. I think your general reasoning is sound as far as packetization and preventing the reconnection loop, but I'm about to begin refactoring a large portion of this repo into more of a general purpose library for BLE data transfer / peer discovery, so I'll have to revisit this PR after that is complete and the data boundaries are more clear.