allow for separate coderoad directory

[ShMcK]

closes #273.
closes #187.

Allows for CodeRoad test runner to be built in a separate directory.

• This is a breaking change, so should require first validating the version of CodeRoad schema with the version of the extension first.

Signed-off-by: shmck shawn.j.mckay@gmail.com

[ShMcK]

One remaining issue.

• The setup commands in the coderoad directory don't seem to work correctly.
  Eg. npm install generates a coderoad/package-lock.json, but no coderoad/node_modules.

If I run the same commands manually, they work. Really not sure why.

[ShMcK]

Resovled - issue was related to my local NODE_ENV=production, and the test dependencies living in devDependencies that don't get called in npm install when production.