submod (test TravisCI build again)
submod (test TravisCI build again)

readium/readium-js-viewer,AndyHubert/readium-js-viewer,readium/readium-js-viewer,AndyHubert/readium-js-viewer,GermanCentralLibraryForTheBlind/readium-js-viewer,GermanCentralLibraryForTheBlind/readium-js-viewer