Survex 1.2.30 released

[Graham Mullan]

Two things:

Firstly, I cannot log in to or create an account on the bug tracker.
Probably 'cos I had an account there a few computers ago & cannot match up
user name/email/password any more. Oh well.

Secondly, on installing 1.2.30, I immediately went to open a .3d file in
Aven, only to be told that its format was 'newer' than any supported by this
version of Survex. Have I discovered time travel?

Graham