Enabled nuget package restore
Upgrade to Caliburn 1.4.1
Upgrade fluent assertions and xunit

Conflicts:
	source/StockTicker.Test/Authentication/ChoosePasswordViewModelTest.cs
	source/StockTicker.Test/Authentication/ChooseUserNameViewModelTest.cs
	source/StockTicker.Test/FindStocks/SearchViewModelTest.cs
Upgrade mspec
Upgrade Extended Wpf Toolkit
Upgrade localization extension
Upgrade to Caliburn.Micro 1.5.1