Initial release candidate - 0.5.0rc1

Initial release for SMPC companion for PySyft

Acknowledgments

• @aanurraj
• @arturomf94
• @gmuraru
• @jmaunon
• @linamnt
• @madhavajay
• @RaghavPrabhakar66
• @LaRiffle
• @omershlo - Sycret review
• @tholop - Sycret work