Remove unnecessary memory barrier
Make m_sync part of irr_driver.
Fix skybox shader sampler type.
Revert "Remove unnecessary memory barrier"

This reverts commit b3ad8179990045010e46ca268f069c8c77bcee6f.
Remove aggressive culling
Simplify culling.
fix weird profiler bug, hovering it would change the values. No idea why these changes work
Use unordered_map in scenemanager
Add an SSE optimised inverse matrix
Reenable aggressive culling