Added brief coding conventions - these may not be complete.

README.md

@@ -3,6 +3,16 @@ CraftBukkit
 
 A Bukkit (Minecraft Server API) implementation
 
+Coding Conventions
+-----------
+
+* We generally follow the Sun/Oracle coding standards.
+* No tabs; use 4 spaces instead.
+* No trailing whitespaces.
+* No 80 column limit or midstatement newlines.
+
+Follow the above conventions if you want your pull requests accepted.
+
 Compilation
 -----------