Added Contains<T>/DoesNotContain<T> for array of T.

Added Contains<T>/DoesNotContain<T> for array of T
This allows to use a statement like:
assert.Contains<string>(['a', 'b', 'c'], myItem.Name)

I don't know if it is D2010 compatible, therefore I included the code in the "IFDEF"-Clause for Delphi_XE_UP.