Casting votes - client side application

Votes now can be cast through browser using metamask.
Updated index.html .
Updated render() from app.js to - list all candidates,handle form submission and hide form after voting.

Casting votes

Votes can now be cast through truffle console.

Test 3 added - verifies behaviour of the vote
Test 4 added - tests validity of the candidate
Test 5 added - tests double voting

Listing candidates

List of candidates and their vote count can be checked on browser.

Test 1 added - verifies the candidate count
Test 2 added - verifies the candidate details
(Tests to be run on truffle console)