added preliminary version of GCTAPsfKing
Merge branch '753-Introduce-GCTAPsfKing' into integration
Add missing header files.
Add King profile PSF unit test, correctly normalize fixed delta_max PSF, and automatically detected King profile PSF upon IRF loading.

A unit test was added to verify that the King profile PSF is normalized correctly. For this purpose a King profile PSF calibration was inserted in slot 2 (bcf/000002) of the calibration database.

As the delta_max has been fixed to 0.7 degrees, the King profile PSF now returns 0 for delta angles larger than 0.7 deg. Furthermore, the PSF is normalized so that the integral from 0 to 0.7 deg gives 1. In that way we assure that the PSF integral is always 1.

The GCTAResponse::load_psf method now automatically detected the King profile PSF. Also, the load method now allow specification of a FITS file as the IRF name.
Limit delta in mc() method to r_max.
Add PSF simulation test script.
Update.
Adapt to new gammalib-00-08-00 interface
Adapt all test scripts to GammaLib-00-08-00.
Avoid printing of blank lines.

The usage of the gammalib::reduce(chatter) function led to blank lines. Now we check if we're higher then TERSE before calling the print() methods with gammalib::reduce(chatter).
Ignore test result file.