@Override
    public Blob getBlob(String containerName, String name) {
        return getBlob(containerName, name, new GetOptions());
    }
BlobStore which maps user metadata keys and values using character
replacement.  This is useful for some object stores like Azure which do not
allow characters like hyphens.  This munges keys and values during putBlob
and unmunges them on getBlob.
src/main/java/org/gaul/s3proxy/UserMetadataReplacerBlobStore.java