Renamed DomainEvent.Test.csproj to DomainEvent.Tests.csproj
Added System.csproj and System.Test.csproj
Enabled NuGet Package Restore
Added NUnit package to System.Tests project
Added TimeTest class
Implemented first test scenario
Renamed System to Wrappers and System.Test to Wrappers.Test
Added Time and TimeTest classes
Added GuidGen and GuidGenTest classes
Added Empty property to GuidGen class for consistency's sake
Merge branch 'system-wrappers'