Added a new activity and brought over some classes

Added the Register Access Point Location Activity
-meant to make adding new Access Points into the system easy

Brought over 3 classes:
-WifiAccessPoint
*a class to hold onto data relevant to an AccessPoint
-WifiConnectionUpdate
*a class that stores a singular instance of user location, and access
Point signal strength (probably less relevant once switch away from gps)
-WifiNetwork
*stores a full WifiNetwork with multiple AccessPoints