Renamed Contains to AnyContains, added AllContains, added overload for both methods that take a Func<T, bool> for comparison
Updated AssertExtensions to use AnyContains and AllContains, added tests for new method
Changed method names
Changed method names... again :grin:
Merge pull request #1272 from khellang/asserts-fix

Split ShouldContain into ShouldContainAny and ShouldContainAll