Matcher and Scanner contribution

[Marc Schier <MS...@bsquare.com>]

I have implemented several matcher Avalon components based on ORO, JDK RegEx
and XPath. They allow you to match for the occurrence of a specific pattern
in an input source document, basically abstracting the text matching
process. I also would like to contribute a scanner package that allows you
to subscribe to changes in a specific source and is build upon the matcher
package. I've attached the source. Let me know whether you find this usefull
or not...

Marc