Updating Zeiss links (rebased onto develop)



This is the same as gh-1144 but rebased onto develop.

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As per discussion between Jason and Zeiss people - updating the links and changing references to 'Carl Zeiss Microscopy' throughout.

They also asked if the .czi file extension in the supported formats table could be made into a hyperlink - I assumed not  but will update the PR if it is possible.