EZP-21036: add test for accepting default empty value
EZP-21036: move correct empty values from invalid to valid test provider
Fixed phpdoc
EZP-21036: remove valid empty values from invalid provider
EZP-21036: add tests for creating with default empty value
EZP-21036: BinaryBase: handle default empty value, set fielsize for known fiel
EZP-21036: handle accepting default empty value
EZP-21036: clear date from ezmedia and ezkeyword tables
EZP-21036: fixed empty value detection
EZP-21036: fixed relation data for empty value
EZP-21036: set name from existing file
EZP-21036: fixed using magic class constant from abstract class
EZP-21036: introduce fieldtype Value interface
EZP-21036: adapt for Value interface and refactor acceptValue()
EZP-21036: refactored fieldtype: Author
EZP-21036: refactored fieldtype: BinaryBase
EZP-21036: refactored fieldtype: BinaryFile
EZP-21036: refactored fieldtype: Media
EZP-21036: refactored fieldtype: Checkbox
EZP-21036: refactored fieldtype: Country