Added CMS_CORE_MODULE which is the mandatory module for ROC CMS.

Added CMS_USER.profile_name .
Improved module managements with install vs enable.
  - enabled/disabled status can also be stored in database.
Install procedure do not install all available modules anymore.

examples/demo/site/config/cms.ini

@@ -43,7 +43,7 @@ output=site\db\mailer.log
 # Default is "on"
 # for each module, this can be overwritten with
 #  module_name= on or off
-*=all
+#*=on
 
 [blocks]
 @include=blocks.ini