refactor CountThread to Callable and store the last tasks
preparations for using the AsyncResource (Jersey) and the Refresher
get count and matches with new asynchronous REST API
improved error handling
allow to cancel query in GUI (does not work in service yet) and wait maxmimal 1 second for query validation in order to be more stable
updating jersey and jetty dependencies
do not give the user to cancel the query on client side, only disable the "Show Result" button

also clarify the meaning of "cancelQueries()" in javadoc and make it private to avoid mis-use
Merge pull request #94 from thomaskrause/queryrefreshcleanup

Use asynchronous REST client