manage plotly/colors.py and plotly/figure_factory/utils.py

[Kully]

Currently a couple figure factories are using incorrect plotly colorscales.

A PR to ensure that:

• the correct plotly colorscales are being used by all figure factories
• functions for color manipulating/handling are only in the colors.py module
• rewritting some figure_factory code to comply with correct colorscales

[jonmmease]

@Kully Is there anything here that we should pick back up?

[Kully]

Is there anything here that we should pick back up?

yes

so the original plan was to organize utils and colors files in the figure_factory folder. There are some duplicates functions across the two folders and some figure factory modules use function A from one file but function A from the other.

[Kully]

closing in favour of #1279