Update installation instructions for macOS on web site

[ryandesign]

The installation section of your web site shows this information:

Mac OS X

jp2a is now part of DarwinPorts, so if you do a

sudo port install jp2a

then everything should be installed.

These names are outdated:

• Mac OS X is now known as macOS
• DarwinPorts is now known as MacPorts

I suggest the above passage should be changed to look like this:

macOS

You can use MacPorts:

sudo port install jp2a

This wording fits better with the existing wording for other operating systems.

Note that I'm suggesting changing the link for MacPorts to point our new jp2a port info page instead of to the MacPorts homepage.

[subelsky]

fyi I was able to use the excellent homebrew build: brew install jp2a

[ryandesign]

Looking at the web site again, I see now that there is also a link at the bottom that reads "jp2a on DarwinPorts". That too needs to be changed to "jp2a on MacPorts" with the link changed to https://ports.macports.org/port/jp2a.

[ryandesign]

Looks like I had already submitted a pull request to fix some of these issues in cslarsen/csl.name#1

I've now submitted a new pull request to fix the remaining issues in cslarsen/csl.name#2

Once that's merged, the changes still need to be deployed to the actual web server, however that happens.