Migrating to aragon-buidler

[sohkai]

The Aragon Buidler plugin may be simpler and more robust than the existing aragonCLI toolchain (which I realize you're also using an older version of!).

If you haven't had a chance to play with it, you can create a new boilerplate off of npx create-aragon-app <name> and try it out!

And it should be fairly straightforward to migrate into, see migration documentation. The major part is that we've replaced the Template.sol with a set of JS "setup hooks" to configure the local test organization.