fix 53

Fixes:

- implemented Trikzter's 'Text Fix vol. III'

- implemented dialog_manager.ltx fix from ponney68 (makes new dialog
actually appear on NPCs)

- implemented missing mesh entries in system.ltx which allow to move
around also Armory Mod meshes (done by ponney68)

- disabled faulty 'SUSAT MERA' (adjustable sight) scope from traders
stocks

- added all missing textures to clear remaining 'red errors' spam from
console and log (assets addon 9)

Gameplay / balance

- attempted to make knives reach longer

- risen trader purchase prices for all weapon addons

- lowered chance of repair tools appearence in lower-ranked NPCs
inventory