Added README.md

Author: IWareQ

README.md

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+# ScoreboardAPI [![](https://jitpack.io/v/IWareQ/ScoreboardAPI.svg)](https://jitpack.io/#IWareQ/ScoreboardAPI)
+
+ScoreboardAPI is a simple library plugin for PowerNukkit/Nukkit Minecraft Bedrock core, that will help you to create
+your custom scoreboards with ease.
+
+##### [Download](https://github.com/IWareQ/ScoreboardAPI/releases)
+
+## Usage
+
+```java
+Scoreboard scoreboard = new Scoreboard("Test Scoreboard", (sb, player) -> {
+    sb.addLine(player.getName());
+    sb.addLine("§1"); // used for skip line
+    sb.addLine("random: " + Math.random());
+    sb.addLine("random: " + Math.random());
+    sb.addLine("random: " + Math.random());
+    sb.addLine("random: " + Math.random());
+    sb.addLine("random: " + Math.random());
+    sb.addLine("§2"); // used for skip line
+    sb.addLine("Online: " + Server.getInstance().getOnlinePlayers().size());
+}, 2); // in seconds
+```
+
+## Maven
+
+#### Repository
+
+```xml
+<repositories>
+    <repository>
+        <id>jitpack.io</id>
+        <url>https://jitpack.io</url>
+    </repository>
+</repositories>
+```
+
+#### Dependency
+```xml
+<dependency>
+    <groupId>com.github.IWareQ</groupId>
+    <artifactId>ScoreboardAPI</artifactId>
+    <version>Tag</version>
+</dependency>
+```