Redux

• Temperature controller bug fix (cooler wont switch off after cool down routine, even when temperature is within range)
• Add unit test coverage for UI
• Increase unit test coverage for the go backend code
• Fix data race bug in stats module
• Upgrade nodejs (8.x) in travis build
• Increase smoke (integration) test coverage
• Fix reverse inlet logic
• Update to react16
• Sign in screen is now mobile friendly