Fix #37

[d4be4st]

Describe the change

Fixes #37
Adds a public method to reset @done and @stopped.

Why are we doing this?

On multi bars if we are adding new bars dynamically, the top bar is going to finished (@done? will return true) after the first registered bar is done.
register method increases the total of @top_bar but @done remains set to true and that why it does not render anymore even though we add new bars.

Benefits

Fixes multiple bars with dynamically registered bars.

Drawbacks

Shouldn't be any

Requirements

Put an X between brackets on each line if you have done the item:
[x] Tests written & passing locally?
[x] Code style checked?
[x] Rebased with master branch?
[x] Documentaion updated?

[coveralls]

Coverage increased (+0.005%) to 99.328% when pulling 80f7e6e on d4be4st:master into 5491328 on piotrmurach:master.

[piotrmurach]

Thank you! ❤️ I may rename the method but the overall solution feels right.