Update UI to reflect the Renaming of Attend to RSVP

[akirk]

No description provided.

[amieiro]

I've been thinking about this change, and I am not sure about it.

In meetup.com, if you take a look to a future event with the en-USinterface, they use:

• the Attend verb to assist to the future event.
• The Attendees noun for the list of future assistants.

RSVP means "Respond, if it pleases you", or just "Please respond", so it could be understood as a request for a confirmation. IMHO, I understand better the "Attend" option and not the RSVP option. What do you think about?

[akirk]

We agreed to close this so that we don't call this rsvp.