Back-end supports poll expiry
Small fix to voting accordion.
Poll expiry creation completed on front-end
Front-end changes to show time remaining
Various fixes
Adds new default date
Merge remote-tracking branch 'upstream/develop' into feature/poll-time-limits

Conflicts:
	VotingApplication/VotingApplication.Web.Api/Scripts/Create.js
	VotingApplication/VotingApplication.Web.Api/Scripts/Poll.js
Merge pull request #98 from stevenhillcox/feature/poll-time-limits

Feature/poll time limits
Merge branch 'develop' into feature/require-authentication

Conflicts:
	VotingApplication/VotingApplication.Data/Model/Poll.cs
	VotingApplication/VotingApplication.Web.Api/Partials/Create.html
	VotingApplication/VotingApplication.Web.Api/Scripts/Create.js
	VotingApplication/VotingApplication.Web.Api/Scripts/Poll.js