Use composer project based site build as the default

[oxyc]

@geerlingguy would you mind testing this to see how the performance has improved since #694 (comment)?

[oxyc]

If this turns out to be fast enough, should we use build_composer_project as the default so we can remove a bunch of steps from the quick start guide? Or should we just use build_composer and change everything to reference the example.drupal.composer.json instead of example.drupal.make.yml?

Another option for those who use Drupal VM as their base repository is to tell them to overwrite Drupal VM's composer.json, with drupal.composer.json. That makes a bit more sense and for this particular scenario I guess users don't care about keeping files unmodified...

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I prefer using build_composer_project as the default because that means all you have to do to setup Drupal VM is:

brew install vagrant
git clone git@github.com:geerlingguy/drupal-vm.git
cd drupal-vm
vagrant up

[geerlingguy]

Yes! If the performance is close, let's use the simplest setup method.

[geerlingguy]

I'll try to run tests tonight, it's crepe night, so it'll have to wait a bit.

[geerlingguy]

(moved test results to issue thread)

[geerlingguy]

Testing is good, I'm going to include a default cachier config for #702 once I get a little more testing completed.