2.1.0-alpha3

What's Changed

• Deprecate flush cache by @dpriskorn in #143
• Add tests for last update functionality by @dpriskorn in #144
• Support last update information by @dpriskorn in #145
• Deprecate flush cache by @dpriskorn in #146
• Fix google books page parse error by @dpriskorn in #149
• Deprecate google books support by @dpriskorn in #150
• Fix remaining google books bugs by @dpriskorn in #151
• Update and publish diagrams by @dpriskorn in #176
• Use threads in worker by @dpriskorn in #243
• Improve logging format by @dpriskorn in #244
• Rename the software by @dpriskorn in #245
• Clean up work_queue class by @dpriskorn in #246
• Fix url parsing by @dpriskorn in #253
• Fix hashing based on url by @dpriskorn in #260
• Fix rebuild cache and wikibase url slash-issue by @dpriskorn in #275
• Fix rdf prefix urls by @dpriskorn in #276
• Add terminology by @dpriskorn in #277
• Prepare 2.1.0-alpha3 by @dpriskorn in #291

Full Changelog: 2.1.0-alpha2...2.1.0-alpha3