OpenBVE v1.11.0.5

Signficant Changes:

• New: Implement sounds for BVE5 AI trains.
• New: Implement default time for BVE5 station jumps.
• Change: Add a tools menu to the GL main menu, and move package management into this menu.
• Change: Update the openbve.desktop file installed by the Debian package.
• Change: Also accept BACKSPACE to clear objects in Object Viewer.
• Fix: Point based sounds were failing to trigger on non BVE5 routes.
• Fix: An invalid position in a quad tree lead to a memory leak.