SciDAVis - Improvements SVN-temp

- implemented Table::importASCII to be used by Python
(partly fixes bug #2686283)

- Fixed collaboration between range selection and other plot tools. Closes bug #2738298.
- Fixed annoying compiler warning in Script.h.

- Fixed excessive triggering of Column::dataChanged(). Closes bug #2676036.

- Fixed a small bug in MuParserScript rewrite (column functions can't be optimized, because they implicitly depend on i).

- Fixed legend display when creating a new function plot (closes bug #2714731).
- Fixed entries of function curves when creating a new legend.

- fixed simultaneous changing of column name and comment

- fixed restoring of validity from v0.2 projects

- Fixed translation-related crash when trying to make a polynomial fit using the
fit wizard (closes bug #2766504).
- Factored out axis-independent code in Graph3D::updateScale(), fixing vanishing
minor tick marks after changing scale settings (bug #2706401).

- Fixed loading of table creation times from 0.2.x projects (bug #2726548).
- Fixed crash when numerical integration uses the maximum number of iterations
(bug #2741082).

- some minor fixes to MuParserScript