Make app list configuration easier

[pathikrit]

Hi I maintain a very similar script myself. See: https://github.com/pathikrit/mac-setup-script

Some ideas:

1. Make it easy to configure the apps by separating out the app list from the script. I tried it a bit by rearranging the code a bit. see my attempt
2. What if the script goes and downloads a provided gist file for the app list? This way everyone keeps their favorite apps in a simple gist file and points this script to that?

Hi 🐒

For those who may be interested in getting a notification when the script is finished, read this !

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