Added cors-headers package to deal with cross site connections.
Added cors-headers package to deal with cross site connections.

wevote/WeVoteServer,wevote/WebAppPublic,wevote/WebAppPublic,wevote/WebAppPublic,jainanisha90/WeVoteServer,wevote/WeVoteServer,jainanisha90/WeVoteServer,jainanisha90/WeVoteServer,wevote/WeVoteServer,wevote/WeVoteServer,wevote/WebAppPublic