Future-proof 'live' tier detection

• Update documentation to explain methods used to determine applications, generations and tiers. bce219a
• Explicitly check for Live tier, rather than assuming it's every hostname that doesn't qualify as the Preview tier. Resolves #2 102eede

v1.0.1...v1.1.0

v1.0.1

• Correct selectors for applications in the Phase 1 generation. Fixes #1 1209622

v1.0.0...v1.0.1