Adrian version 1.3

a Major Update, revising and improving every aspect of the game:

- geometry revised, refined, and polished.
- trench scene overhauled.
- reworked introductory and ending sequences.
- new fonts for the text and the title.
- many changes and corrections to the text.
- some additions to the text.
- new and improved sound effects.
- additional barbed wire backgrounds.
- better performance, fixed a couple bugs.
- other minor improvements.