three more patch updates for xspec 12.5

Three minor patches to the new release are available on the bugs page.

12.5.0b	When the editing commands addcomp, delcomp, or editmod have been used on a model that already contains linked parameters, the link expressions are not properly updated in the output to a save model file. Our thanks to Laura Brenneman for pointing this out. Report added on Dec 03, 2008.
12.5.0c	This removes the warnings issued if datasets contain CHANTYPE strings other than PI or PHA. It will still issue warnings if the CHANTYPE differs between the spectral data and RMF files. Report added on Dec 03, 2008.
12.5.0d	Additional C/Fortran function wrappers provided for the following recently added C++ models: cflux, partcov, simpl, and spexpcut. These are required for users who link the XSPEC models library into an external Fortran or C program. Our thanks to John Houck for pointing this out. Report added on Dec 03, 2008.