2.0.0-beta-6

What's Changed

• Install: rename verb back to safedi-release-install (matches 1.x) by @dfed in #278
• Docs: consolidate closure override examples by @dfed in #280
• Clarify mock API buckets in manual by @dfed in #284
• Add required initializers to README and DocC examples by @dfed in #285
• SafeDITool: add --combined-output flag to generate by @dfed in #283
• Polish 2.0 beta documentation feedback by @dfed in #286

Full Changelog: 2.0.0-beta-5...2.0.0-beta-6