localized some items in English.

HMCLAPI/src/main/java/org/jackhuang/hellominecraft/utils/NetUtils.java

@@ -51,6 +51,7 @@ public final class NetUtils {
 
     public static String getStreamContent(InputStream is, String encoding)
     throws IOException {
+        if (is == null) return null;
         StringBuilder sb = new StringBuilder();
         try (InputStreamReader br = new InputStreamReader(is, encoding)) {
             int len;

HMCLAPI/src/main/java/org/jackhuang/hellominecraft/version/MinecraftRemoteVersions.java

@@ -17,7 +17,6 @@
 package org.jackhuang.hellominecraft.version;
 
 import java.util.ArrayList;
-import org.jackhuang.hellominecraft.C;
 
 /**
  *
@@ -28,8 +27,4 @@ public class MinecraftRemoteVersions {
     public ArrayList<MinecraftRemoteVersion> versions;
     public MinecraftRemoteLatestVersion latest;
 
-    public static MinecraftRemoteVersions fromJson(String s) {
-        return C.gson.fromJson(s, MinecraftRemoteVersions.class);
-    }
-
 }