Invert rows and columns in table of components

[pedrottimark]

1. Easier to read: less wrapping of lines with 2 columns and 4 rows
2. Easier to read: heading column aligned at the right, component columns aligned at the left
3. Easier to understand: smart versus dumb components as columns are "dependent variables" in analogy with the x-axis of a graph, or like month columns in a spreadsheet; characteristics as rows are like line items in a spreadsheet.
4. Easier to modify: you probably won't add another type of component, but you might add another contrasting characteristic (for example, from the bulleted lists in https://medium.com/@dan_abramov/smart-and-dumb-components-7ca2f9a7c7d0). Adding another row to the inverted table would be easy, adding another column to the original table would be harder to do and harder to read.

[gaearon]

👍

[pedrottimark]

Keep up the good work! It is an honor for redux to where I made my first pull request in open source :)

By the way, this change also applies to README.md in react-redux