Hi,

I noticed that a lot of InputStream / OutputStream implementations do not have a matching Reader / Writer implementation. Some would really be useful.

I've made an overview of classes that could be added:
* AutoCloseReader
* BrokenReader
* CloseShieldReader
* ClosedReader
* CountingReader
* DemuxReader
* InfiniteCircularReader
* ObservableReader
* TaggedReader
* TeeReader
* UnixLineEndingReader
* WindowsLineEndingReader

* AppendableWriter
* BrokenWriter
* CloseShieldWriter
* ClosedWriter
* CountingWriter
* DeferredFileWriter
* DemuxWriter
* TaggedWriter
* TeeWriter
* ThresholdingWriter


I am willing to write the following (based on the InputStream implementations), if needed. I have signed the ICLA, have a JIRA account (username Spoor) and a GitHub account (username robtimus):

* AutoCloseReader
* BrokenReader
* CloseShieldReader
* ClosedReader
* CountingReader
* TaggedReader
* TeeReader

* AppendableWriter
* BrokenWriter
* CloseShieldWriter
* ClosedWriter
* CountingWriter
* TaggedWriter
* TeeWriter


In addition, if AppendableWriter is added, I think there should be a method added to IOUtils, to prevent having to create an AppendableWriter for an object that's already a Writer:

    public static Writer writer(final Appendable appendable) {
        if (appendable == null) {
            throw new NullPointerException();
        }
        return appendable instanceof Writer ?
                (Writer) appendable : new AppendableWriter(appendable);
    }


Kind regards,

Rob

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