mostly finished pxnLogger class - wrapper for Logger; adds [messages] to logs
added FormatText class and FormatListener interface
added pxnJavaPlugin abstract class - not yet finished
added pxnLanguageMessages class - not finished
added SignUI class - not finished
added pxnTask abstract class - finished and working

git-svn-id: http://pxncommon.googlecode.com/svn/trunk@11 f5fbd6b6-c213-558c-f92f-5ab434f62466