Fix sand, gravel falling stuck
Disable collision fix, its broke unit tests
Decoration: Add schematic rotation support
Fix i18n of some strings.
Infinite tools in creative mode
Remove unnecessary debug output in node_dig()
Remove texture atlas / AtlasPointer, rename getTextureRaw to getTexture
Cavegen: Prevent caves from occuring above ground level, and superfluous mixing of lava and water in caves
Replace C++ mainmenu by formspec powered one
Fix possible 0 pointer access
Move generateTextureFromMesh to TextureSource to fix a texture leak

TextureSource has a list of textures to delete (m_texture_trash) so this
provides a proper, non-hacky way to delete RTT textures. Also, the prior,
hacky way of deleting them seems to be broken (see pull request #803).

To avoid header file clutter by repeating the same long list of
arguments over and over again, store the arguments of
generateTextureFromMesh in a struct called TextureFromMeshParams.

Also fix issue #782 (Only use bilinear (and others) on item textures
when settings allow it).
Update wiki url
Change debug optimization level back to -O1
Lua main menu: Fix crash on init lua error, mapgen dropdown index, and new worlds not saving index
Directional fog + horizon colors, based on sun & moon positions at sunrise / sunset
Make clouds have the same color as the horizon. Limit view angles to start / end the color transition halfway. Move code in Sky::update and apply it properly.
Combine the colors when looking up or down, otherwise turning looks weird. Tweak moon color.