Survex 1.0.24 released

[Olly Betts]

Download from the usual place:

http://www.survex.com/download.html

No versions for RISC OS and MSDOS on 286 or earlier machines this time.
If you're using one of these and want a newer version, feel free to prod
me.

Here's the usual summary of changes in 1.0.24:

* cavern: fixed LEVEL (broken since around 1.0.8) and added test case.

* cavern: corrected handling of declination in Compass DAT files and added test   case; also added tests for other aspects of Compass DAT file reading.

* printps/printpcl: fixed blank page detection in some obscure cases.

* Documentation: started manual section on working with Compass data files.

* (Unix version): fixed compilation problems with aven and getopt.h on MacOS X
  (and probably some other Unix versions).

* (Unix version): Debian package now Build-Depends on gcc-3.2 and g++-3.2.

Cheers,
Olly