setup circleCI for CI process #11

During the call, we decided to set up CircleCI instead of travis for the CI process. Basically the CI process is supposed to do the following things as of now:

1. run unit tests
2. run typescript (this can be ignored for now and added later when the typescript ticket is complete)
3. run lint
4. run build
5. deploy build (ignored for now until we own a server)