v0.1.1 Release

• Better Slack messaging
• Updated Documentation and Contributing Guides
• Fix execution timestamp update error
• Fix incorrect zscore calculations
• Decrease dockerfile size
• Add GA tag to our documentation
• Add sampling for data points instead of backfill on timestamp
• Add freshness metric check for timestamp columns
• Show healthiness status on a metric in the UI
• Add algolia search to documentation
• Add email to user setup process
• Update docs colors
• Add issues page and model
• Add webhook integration support
• Add BigQuery