Added ShouldBeSubsetOf() for IEnumerables
Fixed exception message
Added more tests
Cosmetic change
Tiny fix
Removed new breaking changes and deleted nUnit source
Added overloads for Should.Throw and Should.NotThrow supporting Tasks
Merge pull request #87 from ilya-murzinov/Issue71

Added ShouldBeSubsetOf() for IEnumerables
Merge pull request #88 from JakeGinnivan/TaskSupport

Added overloads for Should.Throw and Should.NotThrow supporting Tasks