D need a frame and a name to make box more pleasent
D when connect a new arrow, previous arrow is reset
D graph is buggy
D value is buggy
D process is buggy
D reverse axis in graph/histogram
- can't do multiple connections
D parameters order is not preserved
D can lose control of box outside canvas
D miss lots of message for status bar
D help window
D apropos window
D octave does not work on macos
D link can loop on box
D add bootstrap
D implement workbench saving for multiple tools processing
D info message when processing db or tools
D propagate variable after processing db
* refresh status bar more often
- use an octave sub-processs instead of saving workbench
D structural variable in resample
D variable propagation bug
D fix graph display
D fix histogram tool, historams have to be computed independently for each variable
D define a new histogram tool where each bin ccntains same number of data
D some menu items have to be disabled
D matlabify m-files