Problematic Rendering using 3/4 Example

[nathanmargaglio]

In the _setting_up_environmentfull.ipynb notebook, in the 3/4. 'State and Reward' with BTgymStrategy' section, there's an attempt to render that fails due to a call to iterate an integer. Specifically, this is occurring at: https://github.com/Kismuz/btgym/blob/master/btgym/rendering/renderer.py#L331 line_labels = ['line_{}'.format(i) for i in data.shape[-1]] I'm not sure what the original intention is, but this can be easily fixed with: line_labels = ['line_{}'.format(i) for i in range(len(data.shape))] or something similar.

[Kismuz]

@nathanmargaglio , corrected - thanks for spotting it out