Fixed TimeSpan.Zero and added test.
Changed implementation of TimeSpan.Zero and added history.
Added [DefaultMemberReflectabilityAttribute] to specify which members are reflectable by default (#180)
Merge branch 'TimeSpanZero' into develop
Ensured .NET semantics for String.Split methods that take a limit argument (#229). The JS semantics can be found in methods called JsSplit. This might cause compilation errors, but it will not silently break any code.