Test suite execution and stubbing of nsp-api.

The idea is to remove the HTTP dependency and to make the tests to run faster.
Smaller test dependencies to only surface vulnerable modules.
Indent fix.
env-test is no longer required as rewire is used.
Cleanup fixtures and move tests to lab
Merge pull request #3 from tomsteele/tom-edits

Cleanup fixtures and move tests to lab
Add `lab` devDependency.

Suite timeout raised to 30s as tests are slow on 3G tethering.
Merge pull request #52 from oncletom/stub-http-tests

Test suite and nsp-api stub