add better messages telling a user that they sent share requests if they try and email exsisting users

MS DG IZ major invite refactor. all tests are green minus weird stuff on dans computer, need to checkout this out on pivots

InvitationsController update has an error, and our non-specific error catching is messing up knowing what our problems are

This reverts commit 9f4035ab019803fc53844e70884b0519142deb18.

Conflicts:

	app/views/services/_remote_friend.html.haml
	app/views/users/getting_started/_step_3.html.haml

refactored invitations, added them to the last page

fixed styling on adding an aspect to the aspect list

added a facebook for person edit aspect memberships

touched up and simplified sign-up flow

fix styling on step 3