Using new EnsureExtensions, dependencies updated

https://www.nuget.org/packages/Platform.Data/0.0.2

Platform.Threading dependency updated from 0.0.4 to 0.0.5.
Platform.Numbers dependency updated from 0.0.2 to 0.1.0.
Platform.Helpers dependency replaced with Platform.Setters (0.0.1).
Using new EnsureExtensions.
XML documentation file generation turned on.
Travis CI connected.
Refactoring, issues fix.