This is needed for javadocAll since otherwhise there will be smack-core/src/main/java/org/jivesoftware/smack/package-info.java:21: warning: a package-info.java file has already been seen for package org.jivesoftware.smack warnings.
Specify UTF-8 as character set. Added some symbolic links to smack-integration-test for consistency sake.
change from package.html to package-info.java. Add missing package-info.java with a placeholder description.