SciDAVis - Improvements SVN-temp

- prepared release 0.2.2

- Improved Table::importASCII() to behave more like the version in SciDAVis 0.1.x.

- Fixed crashes when using newMatrix(), newTable() and newNote() from Python scripts with
Python 2.6. Apparently, the problem doesn't occur with Python 2.5, although the exact conditions
leading to a crash still need to be pinned down. Fixes bug #2686283.

- 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