Update POM_DESCRIPTION to match README.md

Author: chimbori

gradle.properties

@@ -3,7 +3,7 @@ POM_ARTIFACT_ID=crux
 VERSION_NAME=5.0
 
 POM_NAME=Crux
-POM_DESCRIPTION=Crux parses Web pages to identify the crux of an Article
+POM_DESCRIPTION=Crux offers a flexible plugin-based API & implementation to extract metadata from Web pages.
 POM_INCEPTION_YEAR=2016
 
 POM_URL=https://github.com/chimbori/crux