Further cleaning up

- Updating success messages so that it doesn't say that we will see them
soon if they have chosen "we cannot attend"
- Spelling and Grammatical corrections
- Rewording a few things
- Only display certain text if they are coming - else display you are
not coming on the RSVP view view
- Making the submit consistent on all the pages that have a submit
button.
- Rick Astley Easter Egg.