Tkdbmonitoring 53x

Mostly backportings of existing changes in 6xy and 70x to keep 53x updated. All the changes, including the new ones affect the Tracker monitoring tools for DB conditions. In details they are:
- new boolean in the TrackerMap code to print _only_ the pixel map
- new binary to print a TrackerMap given an input ascii file
- modified scripts to prepare the trend plots of the DB conditions.