Add zoom.us

[conormcd]

Cask for zoom, a video conferencing tool.

[rolandwalker]

Hi! Many thanks for the submission!

Since this installs an App named "zoom.us.app", would you mind renaming the Cask to zoomus.rb (and change the first line to class Zoomus < Cask?

The Cask naming rules are laid out in CONTRIBUTING.md, but they have been changing lately, so it's not surprising if you missed some recent amendments. The doc is also less clear about pkg files, something we need to fix.

Also, it would be good to add an uninstall stanza to this Cask so that brew cask uninstall can work:

  uninstall :files => '/Applications/zoom.us.app'

[rolandwalker]

Now I see that this pkg does some weird things, symlinking the name Zoom to the app bundle zoom.us.app.

[conormcd]

Yeah! The symlink on the desktop is quite obnoxious. I'll make, squash and push those other changes now.

[conormcd]

@rolandwalker Changes made.

[rolandwalker]

Thanks!

[rolandwalker]

After #3011 is merged, I think we can sidestep the weird stuff this installer does.