Update markdown to not have gendered pronouns.

Searched for and replaced all instances of "she's", "he's", "Miss", "Ms", "Mr", "she", "he", "hers" and "his" if they were found. Since this is the source of truth I don't find it necessary to update the .html and other representations.

Fixes: Issue #1 
This seems materially worse. What is being verified here is the client, not the user. It might well be a different user if, for instance, an organization has multiple administrators.