fix typos and docs standards

[akkspros]

fix typos, docs standards and correct my WP.org username
jb added my wp.org handle as ( passionate ) but my wp.org handle is [ passoniate ]

PR: audrasjb/wp-autoupdates#6

[pbiron]

Except for the 3 cases of referer vs referrer, the rest of this good, thanx for checking so closely.

I'll apologize on behalf of @audrasjb for the typo in your .org username.

[pbiron]

Thanx for the quick changes. I'll merge this.