Don't show group invite checkbox list if wp_is_large_network()

Prevents timeout issues on very large sites
Use correct selector for autocomplete on group creation page

Fixes #107
Readme
Trailing whitespace
Suppress setcookie() errors when catching error messages

Fixes #108
Readme
Move nonce check outside wp_is_large_network(0 check
Fix dynamically-created Remove Invite links on group invites page

- Better URL concatenation (borrowed from BP)
- Proper event delegation for AJAX removal

Fixes #109
Readme
Pinking shears
Add is_large_network() support for non-MS. See #109
Fix unlocalizable phrase on accept-invitation screen

I was originally trying to do something fancy to match English syntax, but it
doesn't really work in other languages. This new syntax is much simpler, and
also has proper plural support.

See d050dd4
Introduce "enable group creation step" toggle
Readme
Update registration lock to work with recent versions of multisite
Readme
Fix overloaded property issue related to registration lock
Enforce registration lock when user swaps out email address during registration

Previously, it was possible to bypass the registration lock by going to the
accept-invitation URL using a legit email address, but then swapping out that
email address in the registration form.

Fixes #110

Props @mpa4hu
Readme
Update pot for 1.2