use https instead of http

[pwrose]

Use https://mmtf.rcsb.org ... in all URLs

[iclkevin]

It appears the RCSB servers now require HTTPS, breaking the ReaderUtils.getByteArrayFromUrl(String pdbId) function for obtaining MMTF data. The current solution is to use the overloaded ReaderUtils.getDataFromUrl(String pdbId, boolean https, boolean reduced), sending in a true for the second parameter.