Refactor JobWorkerThread (issue #14)

JobQueue call #notify rather than #notifyAll
JWT is not daemon.
childThreads also consume ParallelRunnable
Use cobertura v2

bump plugin version
ImageCacher handles ThreadInterrupted status. (issue #14)

Wait for exiting JobWorker and retry to shutdown
support auth-retrying (issue #15)
Fix javadoc warnings
Fix shortcutkey bug (issue #17)
Update DefaultTweetLengthCalculator (issue #16)
Update QuoteTweetActionHandler (issue #16)

Bump twitter-text version
Update pom.xml
Generate cobertura xml files
Fix test error (issue #16)

DefaultTweetLengthCalculator cached APIConfiguration statically,
  so test results depend on test order
I missed re-test with violent change in QuoteTweetLengthCalculator... sorry
Refactor JobQueue
add reporting plugin maven-jxr-plugin taglist-maven-plugin
Merge branch 'turenar/pom'

fixes issue #14, #15, #16, #17