This came from a support issue. The WGet script is failing to successfully download files with checksums.

AC:
Fix script to run md5 properly on files with checksums.
Test on partial downloads (resume downloads)
Test on CMIP5 or CCMI1 files.

Note: The current (and broken) script uses single quotes around a bash variable. This was done to handle md5sums of file names with spaces (or other white space) in them. However, this change causes the md5sum command to fail. It is not critical to support files with spaces as we have zero production files published with whitespace in the file name based on review in ~Dec 2017.