message 6.x-1.0-alpha2

Changes since 6.x-1.0-alpha1
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• Better exmaple in API file.
• Add drupal_alter() in exmaple module, to show how to use it.
• Change delete function signrature to get only the ID, and not the full object.
• Load OG plugins only if OG is installed.
• Add safety to check CTools minimal version exists.
• Remove class file.
• Use correct CTools API version.
• Add primary key to the export definition.
• Update plugin and form callback.
• Remove plugin properties that aren't needed - as they are dafultas.
• Use CTools CRUD functions.
• plugin's name is always present.
• Remove obsolete code, as CTools export-ui is taking care of exports.
• Use ctools_static(), instead of regular static.
• Rename Views filter.
• Update signature of form settings callback.
• Update features info.
• Update message-exmaple module.
• Adapt rules to change in message_get_realm_types().
• Improve generic handler logic.
• Move handler to main handlres decleration.