(*) more cleanish javascript code (still hacking on though -- do expect some regression bugs).

(*) more gui-functionality in index.html (e.g. remembering, upon reloading of the tasks-list, the 'show-details' option... even for the tasks which do not yet have any coeffs; not drawing the comparative chart when the shown-detailed-tasks have not progressed far enough to have coefficients values et.al.)

(*) bug-fix -- a usecase whilst moving an active task from 1 to say 5 (when there being only 1 active and 1 pending task, with plenty of complete tasks) the processing server would crash

(*) bug-fix -- when entering a non-number (e.g. "[5") the http server would crash (throws bad lexical cast)