Spin devchain with npx

[0xGabi]

New Feature

As a: developer I want: a devchain with the Aragon bases already deployed So that: I can develop and test Aragon stack

MVP

npx aragen should start a ganache-cli process with the basic bases already deployed.

npx aragen <registry|apps..> should start a ganache-cli process with the basic bases and start a script that deploy the whole registry or the list of apps. Related to #99