Adds unit testing and mocking framework
Downloads nuget.exe if it is not found
Fixes a typo
Merge branch 'develop' of https://github.com/ScottLogic/voting-application into develop

Conflicts:
	VotingApplication/.nuget/NuGet.targets
	VotingApplication/VotingApplication.Web.Api.Tests/VotingApplication.Web.Api.Tests.csproj
	VotingApplication/VotingApplication.Web.Api.Tests/packages.config
	VotingApplication/VotingApplication.sln
Merge pull request #4 from stevenhillcox/develop

Adds unit testing and mocking framework