http://www.broadinstitute.org/igvdata/annotations/hg18/hg18_annotations.xml
http://www.broadinstitute.org/igvdata/hg18/Metabric/metabric.xml
http://www.broadinstitute.org/igvdata/hg18/tcga_external.xml
http://www.broadinstitute.org/igvdata/Tumorscape/Tumorscape.xml
http://www.broadinstitute.org/igvdata/29mammals.xml
http://www.broadinstitute.org/igvdata/hg18/BodyMapCoverage.xml
http://www.broadinstitute.org/igvdata/tutorials/tutorials.xml