Cannot Run Minimal Example

Hi when I tried to run the minimal example

```python
from faropt import FarOpt
```

I cannot reproduce results and I get the error

```
Traceback (most recent call last):
File "/home/ec2-user/environment/faropttest.py", line 1, in
from faropt import FarOpt
ImportError: cannot import name 'FarOpt' from 'faropt' (unknown location)
```

When I check I get the affirmation that faropt is installed under ./environment

I tested from Cloud 9 following option 1 in instructions (region is also correct)

> Create a cloud 9 instance (choose the m5.2xlarge instance type, and a suitable availability zone in network settings, us-east-1a)
> Clone this repo: git clone https://github.com/aws-samples/faropt.git
> cd faropt
> ./setup.sh
> Enter y at the prompt (yes)