Restyle the Voter dashboard to be consistent with other sample apps.
Move Voter dashboard to the web/ sub-directory.
Add javascript and CSS files the Voter dashboard needs so that it can display
correctly without internet access.
Add demo function to Voter's run.sh.
Add comments to the two new demo functions in Voter's run.sh per Xin's review
feedback.
Merge pull request #1584 from VoltDB/voter-dashboard

Voter dashboard

r=xjia