- Added fitsio component
- Added experimentally two new options 'builtin_gsl' and 'builtin_cfitsio'
  to build these packages within ROOT when needed by downloading the source
  code from the web.
- Fixed a problem with sometimes incompatible versions of the python
  interpreter and libraries.


git-svn-id: http://root.cern.ch/svn/root/trunk@39685 27541ba8-7e3a-0410-8455-c3a389f83636