filters: point: Remove the FilterArea.

It was wrong idea to begin with.

Signed-off-by: Cyril Hrubis <metan@ucw.cz>
pywrap: core: Remove/ignore a few functions.

This removes/makes swig ignore a few functions that are not usable from
python and generate warnings.

* Remove GP_Common.h, there is noting that can be used pyton there.

* Ignore GP_DebugPrint(), again not usable.

* Ignore Callback operations.

Signed-off-by: Cyril Hrubis <metan@ucw.cz>