Rfc3161ng

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- fix: update directoryName to be of type Name (19)

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- Support custom TSAPolicyId
- Allow for fetching a TSR without validation

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- Use seconds as argument for tzoffset() for python 2 compatibility
- Added two more timestamping services in README

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- Fix for 11 Some versions of prettyPrint() include quotes, others do not
- Add test verify timestamp response with openssl
- Add test of freetsa.org
- Add return_tsr option to RemoteTimerstamper object
- Added License File
- Updated README
- ASN.1 generalizedTime to Python datetime parser

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- Add utility functions; make_timestamp_request, encode_timestamp_request,
encode_timestamp_response, decode_timestamp_request, decode_timestamp_response

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- Use [bdist_wheel] universal = 1