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Restructured Applicators and Combinators

The current structure got really combersome to use and some cross dependencies got through. So now Applicators and Combinators are namespaces and the individual methods are contained in their own static classes. Many cross dependencies were removed. Applicators and Combinators should only rely on the static factory methods of the Try and Retry types, not one another.
Merged Combinators and Applicators

Applicators are now gone and all extensions live in the Combinators namespace.