Discussed changes implemented.

* Removed "Make an account on GitHub" from in front of three lines. Added "(GitHub account needed.)" at the end of two of those lines. Seems less repetitive, because it's not an instruction, it's a prerequisite.
* Changed "tips" to "updates/changes/issues".
* Changed all mentions of "GamerGateOP" to "GitHub repository".
* Put pronounced emal address in quotes for clarification.
* Streamlined 4chan notes in non-copypasta section.
* Cut out non-copypasta clone of contribution instructions completely.