SciDAVis - Improvements SVN-temp

- fixed compiling problems with SIP 4.6
(Remark1: PyQt3 >= 3.17 is required)

- tagging version 0.9-rc2

- Improved analysis classes: Correlation, Convolution/Deconvolution and added them to the Python scripting interface.

- Improved calculation of minPageSize() used for2D plots exporting to vector formats.
- Added support for SVG export if QtiPlot is built with Qt >= 4.3.
- Fixed bug in Filter::curveData().

- Fixed bugs in Table::restore()

- Reverted previous bogus changes in muParserScript, linked to comma separated values.
- Fixed some bugs in working with folders and improved the Folder class.

- commiting the column data classes so Knut can
take a look at the current state

- Renamed "Nonlinear Curve Fit" to "Fit Wizard".
- Gathered EpsExportDialog and ImageExportOptionsDialog into an extension of ImageExportDialog.
- Added a cell() function for tables.

- improved handling of user input for date/time columns

- implemented handling of [Return] when editing cells
- fixed bug in row/column inserting