Jms Multisite for joomla

In this version, we improved the front-end website creation.

• Fix the front-end success processing to display the message.
• Use the "error" message type when an error is reported to have the message display in red.
• Add processing of the return code of the "OnBeforeSave" plugin to allow abort the slave site creation when an error is reported.
• Give to the front-end the possibility to use alternative "controller" in case where front-end layout would like overwrite the JMS one.
• Add filtering on the "toDBName" and "toPrefix" to remove all non alphanumeric characters. Just accept the underscore.
  This allow using a providing keywords containing special characters like a domain value where the dot(.) and (-) must be removed.
• Allow the component reading of the "module" parameters when submitted by the "Create Site Module" or other module.
• Improve the website replication when some table contain complex sharing expression.
  Add a new parser to analyze the expression.
• Fix the checking on the DB connection to avoid using the error number of a previous call.
  Now use connected() instead of getErrorNum().