Move pregenerated bytecode to resource folder

pom.xml

@@ -24,6 +24,7 @@
       <resource>
         <directory>src/main/resources</directory>
         <includes>
+          <include>org/xerial/snappy/*.bytecode</include>
           <include>org/xerial/snappy/native/**</include>
         </includes>
       </resource>

src/main/java/org/xerial/snappy/SnappyLoader.java

@@ -95,7 +95,8 @@ public class SnappyLoader
     private static byte[] getByteCode(String resourcePath) throws IOException {
 
         InputStream in = SnappyLoader.class.getResourceAsStream(resourcePath);
-        assert (in != null);
+        if (in == null)
+            throw new IOException(resourcePath + " is not found");
         byte[] buf = new byte[1024];
         ByteArrayOutputStream byteCodeBuf = new ByteArrayOutputStream();
         for (int readLength; (readLength = in.read(buf)) != -1;) {