[AndyB] Welcome thread 2.2

Description:
Creates a welcome thread for your new members
(Example of Welcome thread)

(Example of Options page)

Features:

• Creates welcome thread for the new member.
• Creates an alert for the new member about the new thread.
• All phrases start with welcomethread_ for your convenience.

Cron entry:
The Cron entry is set to run every ten minutes. So after the new registration is approved, the Welcome thread will be created within ten minutes.

Database table:
A new table called xf_andy_welcome_thread is created in your database.

Questions and Answers:
Q: Will this work in new registration is done with social media?
A: Yes.