Finish destroy, add force command, work on attach:

  - [x] Add `flight build` which will build the image (new image)
  - [x] Modify makefile
  - [x] Modify `flight launch` to only launch a new container when supplying the
        `-f` parameter.
  - [-] ~~pass container name to runner to run docker container~~ Seems to work
        fine as-is with Id. Would rather use monads.
  - [~] Modify config for stdin by adding attach api call
    - [x] Add `Attach` method
    - [~] Complete `Attach` so that it reads from the stream