Enable 14w11 support, changing servers is a bit iffy though due to EntityMap not being complete.

api/src/main/java/net/md_5/bungee/api/score/Objective.java

@@ -16,5 +16,9 @@ public class Objective
     /**
      * Value of the objective.
      */
-    private final String value; // displayName
+    private final String value;
+    /**
+     * Type; integer or hearts
+     */
+    private final String type;
 }

api/src/main/java/net/md_5/bungee/api/score/Team.java

@@ -17,6 +17,8 @@ public class Team
     private String prefix;
     private String suffix;
     private byte friendlyFire;
+    private String unknown;
+    private byte unknown2;
     private Set<String> players = new HashSet<>();
 
     public Collection<String> getPlayers()

protocol/src/main/java/net/md_5/bungee/protocol/Protocol.java

@@ -94,7 +94,7 @@ public enum Protocol
             };
     /*========================================================================*/
     public static final int MAX_PACKET_ID = 0xFF;
-    public static List<Integer> supportedVersions = Arrays.asList( ProtocolConstants.MINECRAFT_1_7_2, ProtocolConstants.MINECRAFT_1_7_6 );
+    public static List<Integer> supportedVersions = Arrays.asList( ProtocolConstants.MINECRAFT_1_7_2, ProtocolConstants.MINECRAFT_1_7_6, ProtocolConstants.MINECRAFT_14_11_a );
     /*========================================================================*/
     public final DirectionData TO_SERVER = new DirectionData( ProtocolConstants.Direction.TO_SERVER );
     public final DirectionData TO_CLIENT = new DirectionData( ProtocolConstants.Direction.TO_CLIENT );

proxy/src/main/java/net/md_5/bungee/EntityMap.java

@@ -54,7 +54,7 @@ public class EntityMap
         serverboundInts[0x0A] = true; // Animation
         serverboundInts[0x0B] = true; // Entity Action
 
-        if ( version >= 7 )
+        if ( version >= ProtocolConstants.MINECRAFT_14_11_a )
         {
             migrateIntToVarint( clientboundInts, clientboundVarInts );
             migrateIntToVarint( serverboundInts, serverboundVarInts );

proxy/src/main/java/net/md_5/bungee/connection/DownstreamBridge.java

@@ -24,6 +24,7 @@ import net.md_5.bungee.chat.ComponentSerializer;
 import net.md_5.bungee.netty.ChannelWrapper;
 import net.md_5.bungee.netty.PacketHandler;
 import net.md_5.bungee.protocol.PacketWrapper;
+import net.md_5.bungee.protocol.ProtocolConstants;
 import net.md_5.bungee.protocol.packet.KeepAlive;
 import net.md_5.bungee.protocol.packet.PlayerListItem;
 import net.md_5.bungee.protocol.packet.ScoreboardObjective;
@@ -84,8 +85,11 @@ public class DownstreamBridge extends PacketHandler
     public void handle(PacketWrapper packet) throws Exception
     {
         if ( !server.isObsolete() )
+        {
+            if ( con.getPendingConnection().getVersion() <= ProtocolConstants.MINECRAFT_1_7_6 )
             {
                 con.getEntityRewrite().rewriteClientbound( packet.buf, con.getServerEntityId(), con.getClientEntityId() );
+            }
             con.sendPacket( packet );
         }
     }
@@ -114,7 +118,7 @@ public class DownstreamBridge extends PacketHandler
         switch ( objective.getAction() )
         {
             case 0:
-                serverScoreboard.addObjective( new Objective( objective.getName(), objective.getValue() ) );
+                serverScoreboard.addObjective( new Objective( objective.getName(), objective.getValue(), objective.getType() ) );
                 break;
             case 1:
                 serverScoreboard.removeObjective( objective.getName() );
@@ -177,6 +181,8 @@ public class DownstreamBridge extends PacketHandler
                 t.setPrefix( team.getPrefix() );
                 t.setSuffix( team.getSuffix() );
                 t.setFriendlyFire( team.getFriendlyFire() );
+                t.setUnknown( team.getUnknown() );
+                t.setUnknown2( team.getUnknown2() );
             }
             if ( team.getPlayers() != null )
             {

proxy/src/main/java/net/md_5/bungee/connection/InitialHandler.java

@@ -383,7 +383,7 @@ public class InitialHandler extends PacketHandler implements PendingConnection
                                 uniqueId = offlineId;
                             }
 
-                            if ( getVersion() == ProtocolConstants.MINECRAFT_1_7_6 )
+                            if ( getVersion() >= ProtocolConstants.MINECRAFT_1_7_6 )
                             {
                                 unsafe.sendPacket( new LoginSuccess( getUniqueId().toString(), getName() ) ); // With dashes in between
                             } else

proxy/src/main/java/net/md_5/bungee/connection/UpstreamBridge.java

@@ -20,6 +20,7 @@ import net.md_5.bungee.protocol.packet.ClientSettings;
 import net.md_5.bungee.protocol.packet.PluginMessage;
 import java.util.ArrayList;
 import java.util.List;
+import net.md_5.bungee.protocol.ProtocolConstants;
 import net.md_5.bungee.protocol.packet.TabCompleteResponse;
 
 public class UpstreamBridge extends PacketHandler
@@ -61,8 +62,11 @@ public class UpstreamBridge extends PacketHandler
 
     @Override
     public void handle(PacketWrapper packet) throws Exception
+    {
+        if ( con.getPendingConnection().getVersion() <= ProtocolConstants.MINECRAFT_1_7_6 )
         {
             con.getEntityRewrite().rewriteServerbound( packet.buf, con.getClientEntityId(), con.getServerEntityId() );
+        }
         if ( con.getServer() != null )
         {
             con.getServer().getCh().write( packet );