This should contain all the major changes.
For minor stuff, refer to the commit log of the repository.
-X:
+2011-05-29:
- Optimized smooth lighting
- A number of small fixes
- Added clouds and simple skyboxes
- Player privileges on server
- Slightly updated map format
- Player passwords
+- All textures first searched from texture_path
+- Map directory ("map") has been renamed to "world" (just rename it to load an old world)
+- Mouse inversion (invert_mouse)
+- Grass doesn't grow immediately anymore
+- Fence added
2011-04-24:
- Smooth lighting with simple ambient occlusion