Recent XSPEC bug fixes

The following are all available from the usual place.

12.5.0l	This slightly modifies the state of newly untied parameters. When a parameter is untied, its frozen/unfrozen setting should retain the setting of the parameter(s) to which it was linked, rather than be restored to its original value. Our thanks to Phil Evans and Delphine Porquet for pointing this out. Report added on Jan 14, 2009.
12.5.0m	When steppar is executed, it should not automatically run a fit at the end to place the parameters in their best-fit state. Instead it should restore the parameters to their pre-steppar values, regardless of the fit state. Our thanks to Tim Kallman for pointing this out. Report added on Jan 14, 2009.
12.5.0n	Bug fix for a C-to-Fortran boolean conversion error, affecting the default setting for the thermal broadening flag of the bapec and bvapec models. Unless overridden by the APECTHERMAL setting, thermal broadening should be ON by default for bapec and bvapec. This bug has only been observed on Solaris platforms. Report added on Jan 15, 2009.
12.5.0o	When a delcomp operation is performed on the unnamed (default) model and no spectra are loaded, the model calculation is not updated. Our thanks to Laura Brenneman for pointing this out. Report added on Jan 21, 2009.
12.5.0p	This relaxes the OGIP requirement that spectral data files must contain a RESPFILE keyword, primarily to allow the loading of certain RXTE/PCA files. Our thanks to David Smith for pointing this out. Report added on Jan 30, 2009.
12.5.0q	A new option has been added to the tclout command: tclout gain. See the online tclout manual entry for proper syntax and usage. Prior to this, it was not possible to retrieve the values of gain parameters from tclout. Our thanks to Frank Haberl for pointing this out. Report added on Feb 03, 2009.