Add contributor list and change version to 0.9 dev (skipping some version numbers)

README

@@ -3,9 +3,17 @@
 -- |  \/  | |___ ____  |___ |      |    | | \  | |____
 -- |      | |        | |    |      |    | |  \ |     |
 -- |      | |___ ____| |___ |____  |____| |   \| ____|
--- by Jeija, minerd247, sfan5, temperest and other contributors!
+-- by Jeija and contributors
+
+Credits:
+Jeija: main developer
+sfan5: coding, textures
+temperest: coding, textures
+Jordach: Sounds for the noteblock
+minerd247: Some textures
+...other contributors
 
 This is a mod for minetest-c55.
 Paste the "jeija" directory into minetest/data/mods/ to install it.
 
-VERSION: 0.6 DEV
+VERSION: 0.9 DEV