[Kst] reload data vectors

[Marc-Antoine Miville-Deschenes]

It would be nice to have a RELOAD button in the menu bar and
the associated DCOP method so that KST would read again all
the data vectors. That way, if the content of a file has changed
but not its size one can always force KST to read the file again.
For the DCOP method, it would probably be a good idea to be able to
reload all the data vectors at once or only one.

-- 
|- Marc-Antoine Miville-Deschenes
|- Canadian Institute for Theoretical Astrophysics
|- www.cita.utoronto.ca/~mamd/
|- Tel: (1) 416 978 1775
--