Add geolocation; fix map pointer bug; mod styling.

Add:
	static/js/index.js
		-add HTML5 geolocation to front page (templates/index.html).

Mod:
	static/css/(_base, _index).sass
		-fix padding for main container/index.html "start" button (entire
		container initially had top-padding, which interfered with DOM objects
		that weren't the front-page "start" button; just assigned a margin to
		the button).

Fix:
	static/js/index.js
		-fix missing Google Maps location pointer/defunct search bar, by
		initializing the Maps iframe (the crucial line was deleted some time
		before).