Metacat

Change the version to 2.8.0

Merge changes from the 2.6.0 release.

Remove the servlet part from knb metacat url on the morpho screen.

update documentation to use 2.6.0 release number.

And don't forget the alternate Redhat instructions.

refs https://github.nceas.ucsb.edu/KNB/arctic-data/issues/42

We ended up not being able to use IO::Socket::SSL, so I removed the import statement. Also, add the new Perl module dependencies to the installation documentation.

refs https://github.nceas.ucsb.edu/KNB/arctic-data/issues/42

Update the ezid configuration screenshot.

Use a new screenshot with the help icon.

Fixed a typo.

Add the ezid section.