SciDAVis - Improvements SVN-temp

- Tagging version 0.2.4.

- Version bump to 0.2.4.

- README for Windows installer synchronized with the nsi script.

- Compatibility table access functions modified so as not to use deprecated
methods.

- Enabled docstring generation feature in SIP >= 4.10.

- Added column access using array notation. Calls like
t.column("xyz").setValueAt(0,3) are a bit lengthy, especially compared with
the now-deprecated t.setCell("xyz",0,3). Adding the shorthand notation
t["xyz"].setValueAt(0,3) will hopefully make the move towards the
column-as-objects paradigm less painfull.

- Added deprecation annotation to all Python methods marked as such in the
current draft manual, so that using them will generate a warning.

- Updated and rearranged Linux section on download page. Removed names of
package authors/maintainers, since the list was incomplete and trying to keep
it in synch with the developments in various distributions doesn't seem
feasible.

- Update of Czech translation by Pavel Fric.

- Implemented picking of data points from Python scripts, i.e. querying the user
to select a point of a curve on a given graph layer.

- More efficient ASCII export of (large) tables.