Rewrote the mod to use the new param2 color method

New dependency on Unified Dyes.

This change comes with a few neutral-to-positive side effects:

1) Minor recipe changes were necessary since there are only two blocks and
   two poles now.
2) All recipes, node names, etc. were updated to current minetest API.
3) Where recipes called for leaves or sticks, I used groups.
4) the "wavy" (formerly "grey") block and fence/pole can now be
   colored as well.
5) Inside the conversion LBM, some of the original colors were re-mapped
   to the closest Unified Dyes equivalents, to try to keep the on-screen
   appearance mostly the same after conversion.
6) Aside from "BTM" and "Health", all block and pole nodes can take on the
   entire Unified Dyes palette instead of just the 9 originally offered.

Mod works the same as others that depend on Unified Dyes - craft and place
a block or pole, then right-click on it with dye to colorize it.

depends.txt

@@ -1,2 +1,3 @@
 default
 mesecons
+unifieddyes