From Pere:
Implement r48895 in cmake as well.


git-svn-id: https://root.cern.ch/svn/root/trunk@49127 27541ba8-7e3a-0410-8455-c3a389f83636
From Claudi Martinez:
- Removed unused fColumnNames[] and fColumnTypes[] arrays
- Fixed memory leak in LoadHDU()
- Added method: GetColumnName()
- New tutorial FITS_tutorial6.C


git-svn-id: https://root.cern.ch/svn/root/trunk@49128 27541ba8-7e3a-0410-8455-c3a389f83636