Survex 1.0.13 released

[Olly Betts]

I've uploaded Survex 1.0.13:

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

The enhancement to extend in this release is relevant to users on RISC OS or
with MSDOS on 286 or earlier machines, so I'll try to get those versions built
early next week.

This is almost it as far as features for Survex 1.0 goes - I'll finish off
repeat readings, and then it'll probably be just bug fixes.  We've now created
a development branch for what will become Survex 1.1.  So far this just has
a restructured version of aven - I'd expect to see the first beta release from
this right at the start of September (after CUCC's annual expedition).

Here's the usual summary of changes in 1.0.13:

* aven: Fixed bug which caused the occasional spurious leg to be shown
  connecting arbitrary stations.
 
* extend: try to extend along a survey, and make breaks where other surveys
  join.

* cavern: Number reading code reworked to allow repeat readings to be
  supported, but the actual repeat reading code is currently disabled,
  and everything should work exactly as before.

* Experimental support for Chinese (LANG=zh) - only a few messages are
  currently translated.

Cheers,
Olly