renaming Gui into BaseGui and DataFrame into DataElement in accordance with the dfv framework
upgrade gui framework to dfv derived framework
 - introducing new GuiElement structure
 - intoducing modal dialog
 - introducing graphics notebook (tab + saveplotdlg)
 - introducing data table
update original files with upgraded dfv style gui framework
cside uml diagram added
Hub updated and new CsideHub and CsideStartModule introduced (replacing structurally the old Hub)