Added unfinished avg_splineedit.py utility.
Added unfinished avg_splineedit.py utility.

svn path=/trunk/libavg/; revision=7027

scotty007/libavg,th3infinity/libavg,scotty007/libavg,scotty007/libavg,hoodie/libavg,yyd01245/libavg,hoodie/libavg,yyd01245/libavg,libavg/libavg,hoodie/libavg,libavg/libavg,th3infinity/libavg,scotty007/libavg,th3infinity/libavg,hoodie/libavg,yyd01245/libavg,yyd01245/libavg,libavg/libavg,libavg/libavg,th3infinity/libavg