Standardizing the requests UI

Last night we rolled out some more enhancements to the standardized FBML-based requests UI. We added a condensed multi-friend-selector which we think will be a useful alternative way of selecting users to invite to something. We also created a single button UI for sending a request to a specific pre-determined recipient, which we think will satisfy a lot of the use cases that developers have asked for. Finally, we added the ability for the user to include a personalized message with all of these requests (as part of the confirmation screen). <br/><br/> As mentioned when we originally announced the new request form tags, we will be moving ahead with the deprecation of the notifications.sendRequest API method. We will delete this method in 7 days.