Adding labels, using more semantic markup.

issue #92

Can select buttons using the email address.
Can move through the email addresses and buttons using the tab/arrow keys.

close #86

In the steal build script, do concat only, then use YUI compression from compress.sh to do the actual compression.

(resolved) Conflicts:
	browserid/app.js

Cleaning up the developers section to semantic markup, removing script from layout preparing for compression.