SciDAVis - Improvements SVN-temp

- several improvements and fixes to the scripting interface
- moved non-essential initialization of Python environment
to an extern Python script
- right-clicking on column/row headers of Tables and Matrices now
selects that column before displaying the context menu
- added a "Default scripting language" user setting

- Updated to last version of Qwt5 from CVS
- Improved the input checks for the Fit classes in order to prevent crashes due to bad input from the user during scripting sessions.

- added lots of doxygen comments to Scripting.h
- ScriptEdit now displays script output directly instead of on the scripting
console
- added convenience method Fit::errors to retrieve error estimates for results
- added Python constructors for Fit classes that do not need the qti.app
argument
- fixed Python interface to Fit::setInitialGuesses

- Added keyboard shortcuts to the scripting menu in the main menu bar.
- Fixed a bug in deleting fit tables operation.

- changed semantics of QString argument of NonLinearFit constructor
from "formula" to "curveTitle" in order to make it consistent with
the other fit classes
- added some constructors to fit classes in order to unify the fit interface
- removed superfluous call to MultiLayer::updateTransparency from
ApplicationWindow::updateLog
- several bugfixes and improvements to the scripting subsystem

- fixed Bug #8465: Nonlinear Fit Form has no cancel button
(the fit dialog has a close button on all 3 pages now)

- merged the classes fDialog and functionDialogui into
one class FunctionDialog as suggested by Ion

Improved the Fit classes following Knut's suggestions.

- Fixes bugs introduced by the new handling of the fit curves.
- Improved the functionDialog.
- Improved the eventFilter of a table header (the Ctrl button functions again when adding columns to the selection) and removed superfluous Table class global constants.

- Fixed crashes on Windows when executing assignments in Notes.
- Python support now compiles with SIP 4.4.5 as well as SIP 4.2.1;
there are still unresolved issues with the versions in between.