add options to displya resolved file paths and include files deleted from disk
when a child element is started from scratch, withdraw it immediately. it will be un-withdrawn when the parent(s) have been rerun
vrpipe-elements can display more information and can now manually withdrawn chosen elements
add option to vrpipe-setup to touch datasource
Merge branch 'develop' of /software/vertres/git/origin/vr-pipe into develop