Removed the need to load d3 globally

[dangreenisrael]

Changes

• Added d3 and d3-color to package.json
• Load d3 and d3-color in every file that requires d3

Rationale

There were 2 reasons I felt the need to do this:

1. To prevent a conflict between versions of D3 (v3 and v4).
2. We wanted to use this with React and not have to load stuff into onto the window variable

[germanattanasio]

My only concern is that we can still create a bundle that users can use in a ` Githubissues.

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