Added server side command registry mappings (#32)

mappings/net/minecraft/command/CommandRegistry.mapping

@@ -1,4 +1,4 @@
-CLASS none/bc
+CLASS none/bc net/minecraft/command/CommandRegistry
 	FIELD a server Lnet/minecraft/server/MinecraftServer;
 	METHOD <init> (Lnet/minecraft/server/MinecraftServer;)V
 		ARG 0 server

mappings/net/minecraft/server/IntegratedServer.mapping

@@ -6,6 +6,7 @@ CLASS none/caj net/minecraft/server/IntegratedServer
 	METHOD a (Lnone/qx;)V
 	METHOD aa isDedicated ()Z
 	METHOD b addServerInfoToCrashReport (Lnone/b;)Lnone/b;
+	METHOD i createCommandManager ()Lnone/bc;
 	METHOD n getGameMode ()Lnone/ais;
 	METHOD o getDifficulty ()Lnone/qx;
 	METHOD u shutdown ()V

mappings/net/minecraft/server/MinecraftServer.mapping

@@ -11,6 +11,7 @@ CLASS net/minecraft/server/MinecraftServer net/minecraft/server/MinecraftServer
 	FIELD T forceGameMode Z
 	FIELD Z serverThread Ljava/lang/Thread;
 	FIELD a userCacheFile Ljava/io/File;
+	FIELD b commandManager Lnone/m;
 	FIELD c profiler Lnone/os;
 	FIELD d worlds [Lnone/lu;
 	FIELD k LOGGER Lorg/apache/logging/log4j/Logger;
@@ -24,6 +25,7 @@ CLASS net/minecraft/server/MinecraftServer net/minecraft/server/MinecraftServer
 	METHOD A getRunDirectory ()Ljava/io/File;
 	METHOD F start ()V
 	METHOD G getVersion ()Ljava/lang/String;
+	METHOD N getCommandManager ()Lnone/m;
 	METHOD O getKeyPair ()Ljava/security/KeyPair;
 	METHOD P getServerPort ()I
 	METHOD V isDemo ()Z
@@ -85,6 +87,7 @@ CLASS net/minecraft/server/MinecraftServer net/minecraft/server/MinecraftServer
 	METHOD h setFlightEnabled (Z)V
 		ARG 0 value
 	METHOD h_ getName ()Ljava/lang/String;
+	METHOD i createCommandManager ()Lnone/bc;
 	METHOD i setForceGameMode (Z)V
 		ARG 0 value
 	METHOD i_ getNameComponent ()Lnone/fa;