Improve development workflow

[EvanBoyle]

1. Developing new features sometimes requires modifying azsearchstore. It would be good to sort out how we do local development across the projects. There should probably be a development sample that consumes local builds of both azsearchstore and azsearch.js locally.
2. I should create some tests for azsearch.js
3. It would be good to setup continuous integration for checkins that run linting, build on a clean environment, and run a set of tests.

[EvanBoyle]

Closing for now. I think we can defer having an environment to develop both projects simultaneously for now. A combination of CI and tests should be fine for now.