3 Alert Dialogs Added by Mike, Lily, and  Fei

We just implemented alert dialogs for the following activities and
buttons:

Mike:  Dialog fragment appears when a new user submits his/her
information (new_user_login)
Lily:  Dialog fragment appears when the app button for accessing user
addresses is pressed (add_family_members)
Fei:  Dialog fragment appears when logout is pressed (settings).

The buttons in these dialogs still do not do anything and the dialogs
are only dismissed by clicking outside of them.  We need to make the
buttons on the dialogs functional- onClick will not work inside
fragments but I am not sure what will...