Upgrade to CSS4J 0.29

Version 0.29
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 * Core:
- API CHANGE: Interface CSS2ComputedProperties renamed to CSSComputedProperties.
- Values of the background-repeat property are now computed according to the 
  CSS3 spec. *** HEADS UP: now the keywords returned by the background-repeat
  property computed value expand to double values (a list) like ‘repeat repeat’.
  If your rendering process checks for equality to 'repeat', it may break. In
  that case, a solution would be to use getPropertyCSSValue and just supply that
  process with the text for the first list value. ***
- Added SAC_FUNCTION as a possible size value in AbstractCSSPrimitiveValue.
- Layerize sanity check for background-position property.
- Fixed a bug where the last layer of some layered properties [background- 
  (position|repeat|size)] could be lost.
- Support for computing individual layered background properties according to
  CSS Backgrounds and Borders Module Level 3. Initial support for the background
  shorthand was already present in 0.16.
- Improvements to background shorthand setter.
- A shorthand with an 'inherit' keyword now sets all subproperties to 'inherit'.
- BaseCSSStyleDeclaration: getPropertyCSSValue now returns an AbstractCSSValue.
- CSSStyleDeclaration: avoid an _instanceof_ in getPropertyValue.
- Remove old debug logging from BaseCSSStyleSheet.
- BaseCSSStyleSheetFactory now returns AbstractCSSStyleSheet in 
  createStyleSheet, createRuleStyleSheet, and createLinkedStyleSheet methods.
- Use parent stylesheet's createSACParser() method in css rules, if possible.
- DOMCSSPageRule: attempt to parse selector(s) from pseudo page string.
- Update maven POM with cssparser dependency for tests.
- Add steadystate cssparser back to BaseCSSStyleSheetTest sample sheet parsing.
- Allow unit tests to use a specific stylesheet-level SAC parser.
- New unit tests for background-position and page rules.
- CSSStyleDeclarationRuleTest: create a commented test with some tests that 
  current Batik cannot parse.
- Add a javadoc comment to CSSNode.


 * Dom4j module:
- Adapt to core change: interface CSS2ComputedProperties being renamed to
  CSSComputedProperties.

Version 0.28
------------
 * Core:
- Make DOM wrapper ID selectors accept IDs from the 'id', 'ID' and 'Id' 
  attributes.
- Simple box model test (and generator) made more robust.
- Small floating point accuracy adjustments for SimpleBoxModel.
- Removed duplicate test.
- Improved cascade with support for user sheets. Involves a few API changes: for
  example CSSStyleSheetFactory is now an interface.
- Clean-up: removed unnecessary casts.
- The parseCSSStyleSheet method now adds rules with the same origin as the rule 
  with a highest precedence origin.
- Remove deprecated methods in CSSPropertyValueException and 
  CSS2ComputedProperties.
- Methods to get the style sheet factory were getCSSStyleSheetFactory() in 
  documents, and getStyleSheetFactory() in style sheets. Now only the latter form 
  is used.


 * Dom4j module:
- Adapt to changes in core API.
- Removed unnecessary casts from two tests.

Version 0.27
------------
 * Core:
- Configure maven-javadoc-plugin to find overview file.
- BoxValues: add the TableBoxValues subinterface.
- AbstractCSSPrimitiveValue: SAC_DEGREE is not a size unit.
- Convert to absolute units during cascade.
- Simple box model: allows to easily compute box properties for simple 
  documents.
- Added getComputedLineHeight() to CSS2ComputedProperties.
- CSS2ComputedProperties cleanup: method getFontFamily() was not really the 
  same as getFontFamily() in CSS2Properties, so it was renamed to 
  getUsedFontFamily(). If no style database is present and there is a list of 
  values, getUsedFontFamily() returns the first value. Also, method 
  computeFloatValue was deprecated.
- Javadoc comment in CSSPercentageValue made more specific.


 * Dom4j module:
- Avoid line ending problem in XHTMLDocumentFactoryTest.
- Adapt to core change: getFontFamily() --> getUsedFontFamily().


 * Visual module:
- Fix a Javadoc comment in ReplacedElementBox.
- Avoid using XPath in LogErrorHandler.
- Adapt to core changes in CSS2ComputedProperties.

 * Java2D module:
- Adapt to core changes in CSS2ComputedProperties.