SciDAVis - Improvements SVN-temp

- renamed "Do It" and "Do All" to "Execute" and "Execute All", respectively
- fixed undo for tables (matrices did never support it...)
- fixed support for old file formats (untested); cleaned up related code
- added the functions ceil, floor, log10, mod, pow and sum to
muParserScripting
- gotten rid of some compiler warnings

- changed file format to allow multi-line formulae for table columns and
matrices
-> undo broken for tables and matrices!
-> support for old file formats may be broken, too!
- changed file format to allow multi-line axis formulae in graphs
- several minor fixes

- fixed empty output format list

- updated all dialogs ported to Qt4 in this branch
with the changes from trunk rev. 7 to 27

- added version suffix to about dialog and thereby set
the version string to "0.8.6alpha1"

- seems I forgot to convert qtiplot.pro to DOS format

- converted all text files not in 3rdparty to DOS format (CR LF).
- replaced Qwt4.2 with Qwt5 (snapshot from 2006/01/30)
- disabled most of the Qwt based functionality for now in order
to make QtiPlot compile with Qwt5 (!This means all plotting
functionality is broken now!)
reason: Port to Qwt5 is a lot harder than I thought, too many
changes in the API and the class structure
result: QtiPlot compiles and starts without errors
(Plan: Port the trunk to Qt4 now and port/enable the plotting
stuff afterwards.)

changed format of all files to DOS (line endings encoded as \r\n)

- ported Matrix and matrixValuesDialog to scripting interface
- added list of math functions to context menu of script editor
- added e (Euler's constant) to muParserScripting
- some unifications and code cleanups

- scripting interface
- implementation of the interface based on muParser
- setting table column values uses scripting interface
- notes support execution/evaluation of script code (currently calculation of
math expressions and variable assignments)