Add placeholder stuff for legislator detail view.
Add prerequisite project stuff for OpenStreetMap
Add initial mapview code.

It's not pretty, but it works.
Add redundant legislator row, use in -> LEG_DETAILS TRANSITION

The list container will block touches to the details container
if the list container isn't GONE. Adding a redundant legislator
row and binding it to the selected legislator's data allows us
to achieve the desired animation and keep the current z-order
of containers, while avoiding blocked touches.