Improve compatibility with Joomla 1.6 in Jms Multisites.

It now contains the filtering for the "installation/uninstall" processing in a slave site to avoid removing the PHP code of the extension uninstalled or re-install an extension with a different version than the one installed via the master website.

Fix some menu language file to display menu correctly.

Both Joomla 1.5 and 1.6

Add a verification that a DB does not exists when creating a DB dynamically.
In some case, Joomla can return a DB object that has no ressource connected to any DB.
The new check, verify that the DB Oject returned by joomla contain a real MySQL DB ressource.

Bundled with Patch definition 1.2.53

• Add JMS Tools (install) definitions for :
  - Affiliate Text Ads,
  - Attend JEvents,
  - AutoTweet,
  - HikaShop,
  - Newsletter (Joo Mailer Mailchimp Integration),
  - Joo Mailer Mailchimp Signup
  - Joomlart extensions manager
  - JA Buletin,
  - JA MegaMenu,
  - JA News2 Module,
  - JA News Ticker Module,
  - JA News Frontpage Module
  - JA Tabs
  - JA Twitter
  - JA Bookmark
  - JA Disqus Debate Echo Plugin
  - JA Thumbnail
  - JA Popup
  - JA Section menu plugin
  - JA T3 Framework - Need patch
  - JA User Setting
  - JoomShopping
  - Nurte Facebook Like Button
  - OSE UPMan
  - RSComments!
  - RSMail
  - RSMembership!
  - Sobi Pro
  - WDBanners
• Fix Joomla 1.5 sharing definition for
  - Tienda
• Add Joomla 1.5 sharing definition for:
  - HikaShop,
  - Affiliate Text Ads
  - Sobi Pro
• Add Joomla 1.6 sharing definition for:
  - Sobi Pro