Edit docs for new branching workflow

[mek32390]

http://docs.originprotocol.com/#local-development

The docs currently have instructions for how to develop locally using the develop branch. They should be changed to use our new branching model, using master.

[micahalcorn]

Thanks, @mek32390 😬 I've done this but just haven't deployed it.

[mek32390]

@micahalcorn okay, good to know!

[micahalcorn]

Finally deployed this 😅