Smokescreen 1.3.0

• Included gaussian shifts in the cosmological parameters
• Included encryption and decryption of data vectors
• Included new ways of calling smokescreen
• More unit tests
• New documentation on new functionality

What's Changed

• Implement Gaussian shifts by @arthurmloureiro in #60
• Encrypt sacc by @arthurmloureiro in #62

Full Changelog: v1.0.0...v1.3.0