Conversations System v1.0

Hello

This plugin replaces the default PM system by a new group conversation system.

Options :

- Ability to discuss with many persons at once
- Admins are selected by the creator of the conversation
- Auto-complete search user inputs when you create the conversation
- Last time users opened the conversation
- Ability to mark conversation as read/unread
- Admins can invite/kick users, delete conversations
- Search conversations

Screens :