Changes for Version 0.3

• Adjusts the database structure and improves the database performance.
• Creates the user guide pages and API reference pages.
• Improves the demo to support AJAX.
• Fixes other bugs.

Changes for Version 0.2

• Auto-persist the schedules to database for continuous service.
• Saves the user information, schedule information, and operations performed to database.
• Adds log function and schedule history search.
• Provides web-based user management interface.
• Adds an administrator module for the website.
• Provide usage statistic feature.
• Fixes the fire count error bug.