CFITSIO Doesn't seem to support FILE*

[robert.desonia@…]

psImageFReadSection/psImageFWriteSection specifies the use of FILE* to specify
the input stream, but CFITSIO doesn't offer a simple means to utilize such a
thing. CFITSIO seems to prefer only the use of a filename string. How do I
implement the 'F' version of these functions? Should we substitute fitsfile*
for FILE*? That would lock us to the CFITSIO implementation, which is probably
not what you want.

I suggest dropping the 'F' version of these functions unless you know of a way
to get CFITSIO to accept a FILE* to specify the file.

-rdd

[eugene]

we've agreed to drop the Fread, Fwrite versions from PSLib for now.