Email Disclaimer Updates

Changes to _followup_footer.text.erb
- Removed references to PDF Documents
- Removed the s15(2)(c) clause (moved to initial_request.text.erb)
- Added Disclaimer: “Views expressed are those of the sender, not of
OAF/RTK” (After reviewing WTDK -
https://www.whatdotheyknow.com/request/1142/response/2894/attach/93/Re%2
0Whatdotheyknow.html)

Changes made to followup.text.erb
- Moved the email address to be on the same line as the “Please use
this email address for all replies” message

 Changes to initial_request.text.erb
- Moved the email address to be on the same line as the “Please use
this email address for all replies” message
- Added a streamlined and more relevant version of s15(2)(c) notice