Rewrite to avoid all use of pronouns

[WillSullivan]

Rewrite the guidelines on tone and rewrite all current pages to avoid the use of pronouns, be they first person singular/plural, second person or third person.

[su-narthur]

Based on discussion on issue #23

[pinobatch]

The first comment of this issue contains the pronoun "they". Is this comment an example of Muphry's Law? Or was the intent narrower?

[su-narthur]

@pinobatch Please see https://github.com/WillSullivan/idownvotedbecause/issues/23 for the discussion that lead to this decision.