Revision 387477

Made the loading of user-specified hyphenation patterns usable again and plugged it into URI resolution.
Backwards-compatibility should be maintained.
PatternParser now uses JAXP to get the SAX parser.
Moved the hyphenation pattern cache into a separate class so I can easily plug it into FopFactory later instead of having static variables.
Added serialVersionUID to HyphenationTree. Necessary because the class signature changed.
FOURIResolver does not complain about "file not found" on the log anymore since this should be done by the caller. Until now, this resulted in two log messages about the same problem on the log. "File not found" is still reported but only on level "debug" which might be helpful when tracking down a problem, but at least it's not a "WARNING" anymore.