Minor update - Version 2.17c

v2.17c
Translation: add DE, ES, RU language files
Artworks: make movable artworks for screens (lost, victory, etc)
Menu: translate lost/victory/disconnect text
Level: add shadow lurking around
Common: add cracks on central window when broken
Common: Improve performances
Common: add a BIG warning when oxygen is breached
Engineer: fixed a bug where bot used crystals instead of repairs