add a PERFORMANCE_PROBE parser keyword

this contains all performance monitoring keywords like TCPU or PERFORMA
REGION_PROBE: add more user defined keywords

these are not really documented, but they are used by the file
./INCLUDE/SUMMARY/extra.inc of the Norne deck. I don't know why this
did not bite anyone so far, probably people just commented out the
INCLUDE statement of this file...
remove some keywords which are already covered by *_PROBE
Removed all trailing spaces from JSON
Merge pull request #298 from joakim-hove/cherry-pick-PR296

Cherry pick pr296