1. removed looping update, (only updates on button click)
2. locates b old phone, d old phone, and david iphone
3. hardcoded to show location based on RSSI readings.
	note: there are a few bugs in the current algorithm that need to be tracked down
	note: but I'm pushing because our next test on thorton 9th will use
	note: this version (or something close).  Also commented chunks
	note: for anyone who wants to read up on how the current code works.