support/scripts/cpedb.py: new CPE XML helper

support/scripts/cpedb.py: new CPE XML helper

Python class which consumes a NIST CPE XML and provides helper
functions to access and search the db's data.

 - Defines the CPE as a object with operations / formats
 - Processing of CPE dictionary

Signed-off-by: Matthew Weber <[email protected]>
Co-Developed-by: Grégory Clement <[email protected]>
Co-Developed-by: Thomas Petazzoni <[email protected]>
Signed-off-by: Thomas Petazzoni <[email protected]>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <[email protected]>