New minor version v1.6.0

What's Changed

• More testing by @marcpaterno in #310
• More testing of CosmoSIS module by @marcpaterno in #313
• Create a parameter prefix for updatables by @vitenti in #316
• Creating a base class for galaxy based sources. by @vitenti in #321
• Modified NumCosmo connector to support NumCosmo's MPI facilities by @vitenti in #327
• Updated setup.py and moved all options and metadata to setup.cfg by @vitenti in #324
• Version update 1.6.alpha to 1.6.0. by @vitenti in #328

Full Changelog: v1.5.0...v1.6.0