Tweaks to command system to allow setting executors via plugins (no more ambiguous onCommand in plugins)

src/main/java/org/bukkit/command/CommandExecutor.java

@@ -0,0 +1,18 @@
+
+package org.bukkit.command;
+
+/**
+ * Represents a class which contains a single method for executing commands
+ */
+public interface CommandExecutor {
+    /**
+     * Executes the given command, returning its success
+     *
+     * @param sender Source of the command
+     * @param command Command which was executed
+     * @param label Alias of the command which was used
+     * @param args Passed command arguments
+     * @return true if a valid command, otherwise false
+     */
+    public boolean onCommand(CommandSender sender, Command command, String label, String[] args);
+}