Release 2.0.0-beta.3

• diverse fixes, removals (c9436de)
• revert to more restrictive, verbose state-base-class pattern for theme (8ac3580)
• cleanups (6851476)
• restore opacity classes in theme (24df620)
• delete debug of pair lists (110b6ca)
• resolve failing test after sass pkg upgrade (01f3291)
• clean the output from setup-typo a bit (cd924a6)
• large refactor of theme (29ad051)
• clean-ups and consolidations (62d3a9b)