v2.1.0

• Add UserInterface::hasRole method
• Get request format from URL path when possible
• Removed PHP 5.2 support
• Fields that start with an underscore are hidden in JSON layouts by default
• Better handling of empty request payloads
• DatabaseTableAbstract select modes were not properly working
• Grid search would filter selected rows only
• Automatically add [] to multiple select input boxes
• Proper normalization of dates sent in different formats
• Minor frontend display issues