Annual return in bar diagram or similar

[markthebault]

First of all your project is Awesome !!!!

Is your feature request related to a problem? Please describe. No

Describe the solution you'd like I would like to see easily for each year what is my % return, Ideally, it will be a bar chart.

Describe alternatives you've considered In the monthly return add a new column for the annual return

Additional context

[markthebault]

I created a PR here: https://github.com/ssantoshp/Empyrial/pull/38

[santoshlite]

Thanks for contributing! Awesome work, man 😺