Added time.sleep(…).
Added sys: sys.argv, sys.stdin, sys.stdout, sys.stderr, sys.exit(…).
Added TODO notes.
Changed filename structure to Pythonic.[python-module-name].swift
Minor cleanups.
Added usage statistics – "Most frequently used".
No longer exporting Foundation.
Implemented Python's set (unordered collection of distinct hashable objects).
Implemented Python's set (unordered collection of distinct hashable objects).
Added Python compatible methods: discard(…), clear(), isDisjoint(…).
Simplified len(…) – now operating on protocol _Collection instead of specific implementations (Array<T>, Dictionary<T1, T2> and String).
Set now implements ArrayLiteralConvertible (var set: Set<Int> = [2, 4, 8]).
Set now implements LogicValue which allows for "if set { … }".
Set now implements ExtensibleCollection. Simplified code by using set.extend(…).
Set now implements Hashable which allows for sets of sets of sets of sets, etc. :-)
Added test case for equality testing of sets of sets.
Simplified hashValue computation.
Added test for set1.isdisjoint(set2).
Code cleanups.
Disabled tests that triggered a Swift compiler bug: "make test" is now 3 seconds instead of >5 minutes (!).