Add CtCi Swift Package

[sjaindl]

I have created my own Swift solutions for all problems of "Cracking the Coding Interview" 6th edition, bundled in a Swift Package, to make it easy to add as an external dependency to any Swift project.

It includes also solutions to all medium and hard problems, implementations of standard data structures and algorithms (which are partially explained/mentioned in the extra chapters at the appendix of the book). That's why I have chosen this subfolder structure:

• "Algorithms": Standard algorithms such as Djikstra
• "DataStructures": Standard data structures such as MinPriorityQueue
• "SpecificAlgorithms": Solutions to the questions in the book

There are also tests for all algorithms, data structures, and problems in the book. The unit tests can be executed in the DataStructuresAlgorithmsTests class.

Hope that it's useful for many :)

[sjaindl]

@gaylemcd : Is this repository still active?