Unify Halcyon commands
Improve naming
Store builds on S3
Add HALCYON_FORCE_FAIL_INSTALL
Improve Cabal restore logic
Tighten up patterns
Improve download and extract failure logic
Improve cosmetics
Use build tags when cleaning cache
Fix sandbox config saving
Extend unhappy workaround for pandoc
Merge branch 'master' into circuithub-deploy