Allow for yarn workspaces

[acydwarp]

Adonis makes the assumption that node_modules will always be in the app root. With yarn workspaces or monorepo setups, it's not in the app root, but in the project root instead. This PR makes it possible to use adonis in such environments.

[coveralls]

Coverage remained the same at 94.399% when pulling 1ff596e on acydwarp:develop into cbc80e5 on adonisjs:develop.

[coveralls]

Coverage remained the same at 94.399% when pulling d824623 on acydwarp:develop into cbc80e5 on adonisjs:develop.

[thetutlage]

Then how to do handle shared dependencies between mono repos, when all dependencies are in the root?

[thetutlage]

Closed PR. After reading the yarn docs, there are couple of issues with it.

They hoist all the dependencies to the root level, which will never work with AdonisJs, and here's why.

The IoC container needs to have a single instance per application, now if you have 3 applications and @adonisjs/fold is living in the root of all the 3 applications, then it will breaks, since 3 apps are sharing the same IoC container.

Use lernajs, they handle it without hositing apps.