Dependencies: matplotlib and scipy

Fedora:
yum install python-matplotlib-wx scipy

Debian:
apt-get install python-matplotlib python-scipy

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GRASS 7.0.svn (nc_spm_08_grass7):~/grass70 > i.group group=lsat7_2000 subgroup=lsat7_2000 input=`g.mlist rast pat="lsat7_2000_" sep=,`
Segmentation fault

-> should not crash if input is empty (above: * is missing from lsat pattern name_ pat="lsat7_2000_*")

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NEEDS TO BE DONE:

- change layers order #DONE
- ellipses managment #DONE
- flip of digitized area on scatter plot
- synch whith digitizer #DONE
- statusbar showing information about computations and coordinates #DONE
- scatter plot settings #DONE
- export raster map #DONE
- check for range of data, if big show warning
- better temp files clean up
- comment code
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TODO suggestions:

Scatterplot:
- don't allow to go on when no subgroup is present: 
    - error message about missing subgroup in group <%s> #DONE
    - fall back to group selection dialog + error message about missing #DONE

- Dialog "Add scatter plot" 
   Band 1 (x axis)  <<- add #DONE
   Band 2 (y axis)  <<- add #DONE

- Scatter plot toolbar:
  - put "Add SP" icon to the left #DONE
  - when in "Select area" mode, un-highlight zoom + pan icons #DONE
  - zoom to extend in toolbar #DONE

- Scatter plot window
  - zoom icon: also allow for zoom box #DONE
  - mouse wheel: 0.1 zoom step (not 0.5)#DONE
  - add values to axis # it is possible but  IDEA show values in statusbar #DONE implemented statusbar
  - plot legend: strip @mapset off #DONE
  - second plot is falling out of the main window to the left

- Add class
  - rerendering zooms out, it should not #DONE

- confidence ellipse
  - connect to "xx std dev" selection in toolbar #DONE
  - show center of ellipse as little cross #DONE

Wish:
 - optionally link map displays for zoom/pan etc. (icon?)
   See http://trac.osgeo.org/grass/ticket/1669
   (see also http://trac.osgeo.org/grass/changeset/54232 and georectifier)