Trivial.
Globally replaced all instances of ncss/grid/ with ncss/.
Fixed broken links in ChecklistReference.html
Merge branch '4.5.2' of https://github.com/Unidata/thredds into 4.5.2
Removed note in UpgradingTo4.5.html.
* It stated: "Automatic generation of test catalogs on clean install no longer supported". That's no longer true.