Upgrade to CSS4J 0.26

0.26:

CSS4J CHANGES
=============

Version 0.26
------------

• Core:

• Add the convenience method setDefaultHTMLUserAgentSheet() to
  CSSStyleSheetFactory.
• Simplified one of the methods in SheetErrorHandler.
• Added a toString() method that returns getCssText() in
  BaseCSSStyleDeclaration.
• Remove deprecated methods from StyleDatabase.
• Fixed a possible class cast problem in style declaration.
• Unit conversions simplified, and values no longer need StyleDatabaseAware.
• New tests for wrapper-based computed styles.
• Small fix for DOMCSSStyleSheetFactoryTest.
• Fixed a regression in setting the border-width shorthand when the value is
  zero.
• Apply constrains to border-width computed vaues.
• Added getComplianceMode() to CSSStyleSheetFactory.
• Add support for the 'initial' keyword.
• Remove StyleDatabaseAware interface.
• StyleDatabase: getWidthSize(widthIdentifier, fontSize) replaces
  getWidthSize(widthIdentifier), which is deprecated. Also, method
  stringWidth(text, style) added to CSSCanvas.
• Added support for 'ex' units in getComputedFontSize().
• Small documentation change for StyleDatabase.
• Additional tests for border properties.

• Dom4j module:

• Fixed a possible class cast problem in style declaration.
• Implemented setDefaultHTMLUserAgentSheet in XHTMLDocumentFactory.
• Set TestDocumentFactory compliance mode to quirks.
• Add a convenience method to XHTMLDocumentFactoryTest.
• Remove mention to StyleDatabaseAware interface.

0.25:

CSS4J CHANGES
=============

Version 0.25
------------

• The library has been modularized: there is the css4j core, and the dom4j,
  visual and java2d modules. Most users will just want the 'css4j' and
  'css4j-dom4j' jar files. The 'java2d' module depends on 'visual'.
• The style sheet factories can now operate under a compliance mode. Two modes
  are currently supported: LENIENT and QUIRKS. LENIENT is intended for the case
  where no style database is available, and it allows to compute values by
  giving reasonable defaults to properties with system-dependent initial values:
  '#ffffff' for color and 'serif' for font-family. It is recommended to provide
  a style database and work with the QUIRKS mode, however. Stand-alone style
  declarations always work in QUIRKS mode. A STRICT mode may be available in the
  future.
• Now all CSS3 color identifiers can be used for any color property in any
  shorthand. And identifier values that contain a valid color identifier deliver
  a proper RGBColor when getRGBColorValue() is called.
• StylableDocumentWrapper and DOMCSSStyleSheetFactory were moved from package
  doc.style.css to doc.style.css.dom.
• More consistent handling of property name case at getPropertyValue and
  getPropertyCSSValue.
• Improved upper/lower case tolerance for dom4j elements. Now elements with an
  uppercase 'ID' attribute should work as if the 'id' was lowercase.
• Removed logging from a few places where it was unnecessary.
• DOM wrapper cascade fix.
• Fix for readURL in the wrapper-based user agent of DOMCSSStyleSheetFactory.
• Fixed a bug matching the lang attribute in selectors.