fixed IronPython source with mixed line endings, changed to LF
Merge pull request #1140 from paweljasinski/crlf2lf

fixed IronPython source with mixed line endings, changed to LF
Fix #1139: PythonTuple.GetHashCode with None

PythonTuple.GetHashCode() takes a different code path than hash(), and
that code path did not take null into account. Use
NoneTypeOps.NoneHashCode (same as the hash() path) so that they are
consistent.