Add changelog and readme

CHANGELOG.md

@@ -0,0 +1,8 @@
+# Changelog
+
+Based on the [Keep a Changelog](https://keepachangelog.com/en/1.0.0/) format.
+This project also follows the [Semantic Versioning](https://semver.org/) spec for versions.
+
+## [1.0.0] - 2020-05-04
+
+Initial release.

README.md

@@ -0,0 +1,22 @@
+# Nbt
+
+A simple NBT library with support for custom tag types.
+
+## Usage
+
+### Dependency
+
+You can get it via [JitPack](https://jitpack.io/):
+
+```groovy
+repositories {
+    maven {
+        name = "JitPack"
+        url = "https://jitpack.io/"
+    }
+}
+
+dependencies {
+    implementation "com.github.AntiquityMC:Nbt:1.0.0"
+}
+```

src/main/java/io/github/antiquitymc/nbt/NbtIo.java

@@ -8,6 +8,9 @@
 import java.util.zip.GZIPInputStream;
 import java.util.zip.GZIPOutputStream;
 
+/**
+ * Reads and writes {@linkplain NamedTag named tags} from {@link InputStream} and to {@link OutputStream}.
+ */
 public final class NbtIo {
     private NbtIo() {
     }