adding a helper class to controll polling during an UI.access call
making the poll time functions private and provide an API to run Jobs in the background instead
some error handling
using the polling also when fetching the results and remove the vaadin-push dependency
actually show progress
use new poll method in frequency analysis and output some debugging information in GUI
use UUID instead of thread ID and set the polling time before the thread starts, since if thread starting takes too long nothing will happen
more conservative poll times
allow to wait an initial time for the computation result (which gives much faster feedback times if computation is fast enough)
actually get the corpus information in the background
removed debug code
removing all the push code and introduce a global \"PushControl\" instead
Merge branch 'origin/develop'