When only a filename is passed to kst without any further arguments
and it is not a .kst file try to find a datasource which could load it,
and show all vectors against INDEX. Each datasource could overwrite this
behavior, like it was asked by Syam Krishnan C.R. on the mailinglist.

Having this feature it is now possible to register Kst as default program
for opening data files: double-click on your data file and see Kst previewing
your data!