String tdfFile = "http://www.broadinstitute.org/igvdata/annotations/hg18/conservation/omega.12mer.tdf";
IGVSeekableHTTPStream hs = new IGVSeekableHTTPStream(new URL(tdfFile));
final int position = 100;
hs.seek(position);
final int range = 1000;
byte[] expectedBytes = new byte[range];
hs.read(expectedBytes, 0, expectedBytes.length);
SeekableServiceStream sss = new SeekableServiceStream(new URL(tdfFile));