FITS files interface tutorials

Examples showing the FITS file interface.

Files
file	FITS_tutorial1.C
	Open a FITS file and retrieve the first plane of the image array as a TImage object.
file	FITS_tutorial2.C
	Open a FITS file whose primary array represents a spectrum (flux vs wavelength)
file	FITS_tutorial3.C
	Open a FITS file and retrieve the first plane of the image array as a TImage object.
file	FITS_tutorial4.C
	Open a FITS file whose primary array represents a spectrum (flux vs wavelength)
file	FITS_tutorial5.C
	Open a FITS file whose primary array represents a spectrum (flux vs wavelength)
file	FITS_tutorial6.C
	Open a FITS file whose primary array represents a spectrum table (flux vs wavelength) and dump its columns.