maven structure is changed: the example java files are not included any longer (e.g. Wordcount from the Flink team). The zipping is now performed on pom.xml as well (was excluded in previous versions)...
fixed bug when cleanup method is invoked - cleanup on the file was invoked before the FileInputStream was closed... Cleanup is currently not used, since it is easier to test. Needs to be introduced back in another version
changed the HTTP headers a bit - the browser still doesn't open a dialogue, but the headers should be correct now