BufferedData readBytes() and writeBytes() are not symmetric

`BufferedData` class contains `readBytes()` and `writeBytes()` method, which work with another `BufferedData` object. I would expect that

```java
bufferedData1.readBytes(bufferedData2);
```

should be the same as

```java
bufferedData2.writeBytes(bufferedData1);
```

but they are not. `writeBytes()` just forwards the call to the underlying byte buffer. `readBytes()` is slightly more intelligent, it checks remaining bytes, sets the limit, then write actual bytes, and finally resets the limit.