Add Sample of Automatically Loading First Set of Data. Since the new `ion-infinite-scroll` does not automatically load data, devs need to see how to kick it off the first time.
Overhaul of the tap system so the keyboard does not cover up focused
inputs, correctly bring up the keyboard on text input focus, disabling
focus during scroll, disabling clicks after a hold then scroll,
removing 300ms delay without additional event handlers on each element,
etc. Refactored the tap/click/scroll/activator events for more
testability, along with adding more tests.
