added mod files and readme's

README.md

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+Bonemeal mod [bonemeal]
+
+This mod adds two new items into the game, bones which can be dug from normal
+dirt and bonemeal which is crafted from bones and player bone blocks.
+
+Bonemeal can be used on added saplings for a 1 in 2 chance to grow them quickly
+as well as specified crops which are grown 1 to 4 steps at a time.  Dirt can
+also be clicked for random grass, flowers or registered decoration to appear.
+
+The api.txt document shows how to add your own saplings, crops and grasses to
+the list by using one of the 3 commands included and the mod.lua file gives you
+many examples by using some of the popular mods available.
+
+https://forum.minetest.net/viewtopic.php?f=9&t=13284
+
+Changelog:
+
+- 0.1 - Initial release