added a Qt implementation of our progressbar and added a "precise" option to time2str
* added command line argument (-p/--progress) to enable reporting of global/simulation progress, it does not play well with (interactive) charts though.
* added a title argument to loop_wh_progress to set the title of the window and use it for all instances of loop_wh_progress
* show top times now also show the % of total
* added optional "user value" label in progressbar dialog (eg show current period for the simulation progress)
Merge branch 'liam2-127'