Demo update notes for v0.30

[p]Truck City v0.30-Demo has just been released. Note this changelog takes over from v0.29-Playtest, and is the version of the first demo release.

This changelog also includes patch changes in v0.29.1, v0.29.2, v0.29.3. v0.29.4, and v0.29.5[/p]

• [p]Feature: added traffic lights[/p]
• [p]Feature: added nuke easter egg[/p]
• [p]Feature: added truck manual despawn button[/p]
• [p]Feature: added hover sound when moving the mouse over buttons[/p]
• [p]Feature: science menu supports WASD for navigation[/p]
• [p]Bugfix: corrected truck preview in trucks list menu[/p]
• [p]Improvement: science menu now shows different colors for each science[/p]
• [p]Bugfix: removed volumetric fog temporal reprojection to prevent light leak visual glitch[/p]
• [p]Feature: added roundabouts[/p]
• [p]Bugfix: added safeguards to prevent crash[/p]
• [p]Bugfix: improved container texture cache[/p]
• [p]Improvement: added information on one-way direction[/p]
• [p]Improvement: texture cache now saved to disk for faster access[/p]
• [p]Improvement: lateral bar mini buttons made bigger[/p]
• [p]Improvement: translations improved[/p]
• [p]Improvement: minor adjustments to tutorials and missions[/p]
• [p]Improvement: hotkey handling improved[/p]
• [p]Improvement: added market menu in F11. Blueprints use B instead of F11 now.[/p]
• [p]Bugfix: phantom container would remain on trucks even after unloading[/p]