1.0.0 release

[larsiusprime]

• [x] Clear all issues
• [x] Update docs
• [x] Remove OpenFL dependency
  • [x] replace Assets.get, etc with generic user supplied fetch callbacks
  • [x] clear package cruft
• [x] Test
• [x] Document font replacement
• [x] Document "more than one value column" pattern in a TSV/CSV file
• [x] Changelog