Upgrade to CSS4J 0.24.1 & JCLF 4.0.0

Version 0.22
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- IMPORTANT: all packaging has been changed from info.informatica to io.sf.carte
  for better long-term safety.
- Added a Maven build (requires dom4j 2.0).
- Removed an old Carte DTD information from DefaultEntityResolver.


Version 0.21
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- New default CSS style sheet for (X)HTML documents, defining styles for HTML5
  elements.
- Updated the public suffix list used by the default user agent.
- Removed the long-deprecated AbstractCSSStyleDeclaration.parseProperty method.
  Use AbstractCSSValue.parseProperty instead.
- Removed one of the two uses of the JCLF dependency.


Version 0.20.1
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- Corrected the build and runtime dependencies in the Release Notes.
- One of the tests in AWTDeviceFactoryTest was dependent on operating system
  specific setup. Changed to a simple 'assertNotNull'.
- DocumentCSS.getOverrideStyle now works when using the generic DOM wrapper, and
  was cleaned up in XHTMLDocument.
- Fixed a few possible NPEs when parsing shorthands.
- Fixed an NPE code path handling media rules.
- Fixed an NPE code path when handling the base URL.
- Added configuration for new CSS3 text-related properties, and for the 
  font-variant-east-asian property.