ABP Force Portal 1.7

This plugin redirects users who come (back) to index page and didn't visit the forum since a delay (fixed by admin) to the portal page.

# Upgrade
* Deactivate plugin in ACP
* Install the plugin

# Intallation
* Unzip the .zip
* Copy the UPLOAD contents to the forum root
* Activate plugin in ACP

# Settings
* portal page (must be a MyBB page)
* delay for guest (in hours)
* delay for members (in hours)

# Languages
english, french

# Changelog
* Version 1.7.1 : Corrected a typo 
* Version 1.7 : added a way to exclude some groups of being redirected
* Version 1.6 : removed a call to an unexistant function
* Version 1.5 : changed constant CODENAME to an unique name
* Version 1.4 :
  * added codename setting to allow the update notification
  * moved (de)active to (un)install
* Version 1.3 :
  * addition of setting for members and guests
  * changed the delay fields in numeric
* Version 1.2 : corrected a bad call to $mybb->settings
* Version 1.1 : force the setting of the cookie expiration.