CSS regression testing tool for Bootstrap

• grunt-sauce-screenshots to take screenshots in various browsers
• GraphicsMagick compare to compare the screenshots and output visual diffs; see dpxdt for usage
• Flask web app to review diffs and approve intentional changes
• Flask-OAuthlib for GitHub-based login
• Some Python GitHub API library to post issues to the issue tracker when there are differences

• result: id, run_id, platform_id, testcase_name, filename
• run: id, timestamp
• platform: os, browser (both include optional version portion)
• reference: id, result_id, timestamp, user