[Examples] include examples for both clean and performance patterns

[ZacharyPatten]

Much of the code in Towel is written two support patterns for both cleanest and most performant code. There needs to be two sets of examples demonstrating both patterns.

For example...

// Clean Pattern
IMap<string, int> map = MapHashLinked.New<string, int>();

// Performance Pattern
struct IntHash : IFunc<int, int> { public int Do(int a) => a; }
struct IntEquate : IFunc<int, int, bool> { public bool Do(int a, int b) => a == b; }

var map = new MapHashLinked<string, int, IntEquate, IntHash>();

[ZacharyPatten]

I'm trying to decide the best approach for implementing this issue. I'm currently considering the following:

1. separate projects like Examples\DataStructuresClean and Examples\DataStructuresPerformance
2. implement both version in the current projects but have a #if Clean/Performance compiler directive
3. just include inline comments that show the two different patterns

I'm leaning towards option 2, but I'm open to opinions.