0.19.2 developer preview is up

Changes:

• Removed most of errors from the console.
• Full screen mode should now properly hide taskbars on all platforms.
• Incompatible GPU should now produce error message instead of crashing.
• Fine-tuned tiny asteroids.
• Adds per-pixel transparency to splash screen.

Known issues:

• Closing the game still causes segfault on linux (and probably other systems, but is not very visible).