Merge remote-tracking branch 'origin/master'

# Conflicts:
#	mirai-core/src/main/java/net/mamoe/mirai/utils/MiraiLogger.kt

mirai-api/src/main/java/net/mamoe/mirai/MiraiAPI.java

 package net.mamoe.mirai;
 
+import java.io.PrintStream;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -32,6 +33,10 @@ public class MiraiAPI {
         MiraiMain.main(args);
     }
 
+    public static void setLogger(PrintStream stream){
+        MiraiServer.getInstance().getLogger().setOutPutStream(stream);
+    }
+
     public static String getMiraiVersion(){
         return MiraiServer.MIRAI_VERSION;
     }

mirai-console/src/main/java/net/mamoe/mirai/MiraiConsole.java

@@ -13,4 +13,7 @@ public class MiraiConsole {
     }
 
 
+    public void log(Object o){
+        System.out.println(o);
+    }
 }

mirai-console/src/main/java/net/mamoe/mirai/MiraiMain.java

@@ -3,6 +3,8 @@ package net.mamoe.mirai;
 
 import lombok.Getter;
 
+import java.io.PrintStream;
+
 /**
  * @author NaturalHG
  */