add module play with filters in the examples

sources/examples/muContext-play-with-filters/pom.xml

...uContext-play-with-filters/src/main/javadoc/overview.html

...va/mucontext/playwithfilters/TestBe4MEDistUrLocation.java

...est/java/mucontext/playwithfilters/TestBe4MEIncident.java

...st/java/mucontext/playwithfilters/TestBe4MEItinerary.java

...context/playwithfilters/TestBe4MELocateAndRecommendU.java

...test/java/mucontext/playwithfilters/TestBe4MERFIDTag.java

...ava/mucontext/playwithfilters/TestBe4METagUrLocation.java

...filters/src/test/java/mucontext/playwithfilters/Util.java