Type-safe counts, array indices, and array subscripting

• Added the ability for any UniqueIntegerType-conforming type to initialise itself with an Int and to retrieve the underlying value as an Int. The result for either operation is nil when the operation can't be performed.

• Added TypesafeIntegerIndexType.

• Added TypesafeCountType.

• Added support for returning TypesafeCountType instances when querying the size of an Array, Set, or Dictionary.

• Added support for Array subscripting using TypesafeIntegerIndexType instances.

• Added missing support for hashing a Dictionary.

• Streamlined and made the code more homogeneous between the various protocols and their extensions, for ease of reading and understanding.

Support for boolean operators

This release adds automatic support for !, &&, and || operators to any type conforming to UniqueBooleanType.

Initial release

1.0.0