Changed Mese to act like an object cut out of a block of stone, rather than an
object found *among* the stone.

That is, mese should behave such that you get something potentially useful out
of the aggregate block you just broke, rather than just collecting the whole
block when mined.

Mese crystals in stone give a single Mese Crystal when mines. Craft three of
those + 2 sticks for Mese Pickaxe, or 9 for a Mese block. Craft one Mese
Crystal by itself to get 9 Mese Crystal fragments, which all mods should use
when a full Mese Crystal is too much.

This includes new textures for the above objects, tweaks to the sounds used for
them, and naming tweaks for the textures used for default mese in stone, so
that old texture packs don't use the "wrong" image.

This represents my best effort to match C55's suggestions.
Removed significant details from default_dirt.png to make it look less repetative
Fixed default_grass_side.png
add new texture with shading this time around.

also, license follows the default one since thats how the textures for
minetest_game usually work.
Run nodeupdate after decay.
Run nodeupdate() after burning nodes.
Convert old mese to the new mese block and generate it deep underground
new mese pick texture
Remove old unused texture
Make fire buildable to
Fix a glitch where the player gets liquids in his inventory when the server lags
Add a selection box for stairs that fit the nodebox
Show the contents of the locked chest only to the owner
Expose generate_ore
Wool group

For better crafting and modding.
Add junglegrass to mapgen
Open/close doors with rightclick
Better lump & ingot textures
Update minetest.show_formspec()
Fix texture glitch when digging junglegrass