invite 7.x-4.0-beta3

Issue #2079671 by spiderman: Invite only option
Issue #2826683 by SpartyDan: Invite_by_email install/enable/disable/uninstall do not work correctly
Issue #2826642 by SpartyDan: If no Invite Types are enabled page should not display 'Select type of invite to create.'
Issue #2720841 by rositis@gmail.com, SpartyDan: Update 7401 failing
Issue #2826179 by SpartyDan: Existing invite code is never executed
Issue #2823994 by dksdev01, SpartyDan: validation not working with invite_by_email
Issue #2622562 by captainack: Notice: Undefined property: Invite::$resent in invite_by_email_send_invitation() (line 347 of .../invite/modules/invite_by_email/invite_by_email.module)
Issue #2632884 by Sylense: Allow invitee to withdraw invite (The invitation has already been withdrawn)
Issue #2135569 by ckng: Initial Invites tab on user account is empty
Issue #2580531 by ckng: Canceling account. Integrity constraint violation: Duplicate entry
Issue #2088487 by DuaelFr: Improve access to resend feature
Issue #2492655 by dawehner: Add test coverage for expiry date
Issue #2529820 by captainack: Import code loses sending method / invite_sending_controller - using features or otherwise
Issue #2483177 by kaare, ckng: Strict warning in invite_withdraw_form()
Issue #2279849 by alberto56, ckng: Store a key, not the actual invite object, in the mail
by ckng: improved code readability
Issue #2292075 by franksj, ckng: User updates own profile. user->picture removed during invite_notifications_init(), grammar
Issue #2501499 by David_Rothstein: If an existing user is invited and is not logged in when clicking the link to accept the invite, the invitation is never accepted
Issue #2227995 by moertle, kaare: Avoid drupal_goto() within invite_withdraw_form_submit()
Issue #2223399 by steven.wichers, ckng: Allow modules to change the redirect destination and message
Issue #2134139 by kaare, ckng: Fixed missing period
Issue #2134139 by kaare, ckng: Duplicate acception messages for registered users
Issue #2299981 by cosolom, ckng: Empty email when body field using input format
Issue #2146081 by David_Rothstein, ckng: Grammar and spelling mistakes
Issue #2501427 by David_Rothstein, ckng: "Use default settings" option doesn't work for mail body and subject; instead the global settings are inconsistently used