25 Aug. 2010 vx.x.x   fixed; apply trans & filt on spectrum
20 Aug. 2010 vx.x.x   add stretching transform mode
19 Aug. 2010 vx.x.x   add drawing filter mode
17 Aug. 2010 vx.x.x   import spectrum / save vtd are done.
                      begin developping vtd Editor for v.Connect