SciDAVis - Improvements SVN-temp

- Fixes the saving/restoring of Image/Line/Legend plot markers, using axis coordinates and not pixel coordinates as before.
- Fixes bugs in scalePicker class.

Added the possibility to set and store default parameters used when drawing of arrows//lines and texts on 2D plots.

- merged all Qwt based classes from the scripting
branch (r105) into the trunk
- fixed all compiling errors
Result:
- the trunk now compiles using the Qwt CVS
snapshot from (2006/07/09)
- 2D plotting works but is still very buggy

- Improves drawing of 2D plots grid and inward ticks.
- Hopefully fixes bug #7910 (Disapperaing of the buttons in the maximized sub-window). Still to be tested!

Improved the code for printing 2D plots.

Fixes the export to SVG of the 2D plots background color.

Added scales.cpp and scales.h files (replacing deleted scaleDraws.h)

Hopefully fixes the drawing of axis backbones and their export to SVG and EPS.

- updating the Qwt version in the trunk to the CVS
snapshot from yesterday (2006/07/09)

Fixed bugs in drawing the title of 2D plots.