Joomla 1.6 enhancement

• Refactor the installer
  This Jms Multisite version refactor the installer to use the new joomla 1.6 recommended processing.
  With this new installer, it is now possible in Joomla 1.6 to re-install Jms Multisite over an existing one without having to uninstall it before re-install.
• Fix a bug in the JMS Tools when displaying the modules definitions under joomla 1.6. In fact a MySQL syntax error is fixed.
• Also reduce the scope of the component displayed to the "site" (non core or not protected) under Joomla 1.6
  This avoid listing the "protected" components.

Both Joomla 1.5 and Joomla 1.6 bug fix

• Fix a bug in the utility that update the status of the orders when the letter tree is enabled.
  This affect the Bridge for VirtueMart when Jms Multi Sites is configured with letter tree.
  In this case, the status of a website was not updated.

Bundled with Patch definition 1.2.58

• Add JMS Tools (install) definitions for :
  - jVideoDirect
• Add Joomla 1.5 sharing definition for:
  - jVideoDirect,
  - Simple Image Gallery