PSSNode: allow set user's data
PSSNode: allow set user's data

there are two types of data: analysis' data and user's data.
The first serve to the analysis that is running and the later
one for the backend - for example for mapping the pss nodes
back to CFG nodes or similar

Signed-off-by: Marek Chalupa <a05df156a69ad59faa9af9b666ef78009594c145@gmail.com>

mchalupa/dg,mchalupa/dg,mchalupa/dg,mchalupa/dg