blog_entry_created - Removed summary field
blog_entry_deleted - Removed summary field and unwanted entry record
blog_entry_updated - Fixed single quotes and removed summary field
course_module_created - Removed subject
course_module_updated - Removed subject
user_deleted - Removed user firstname and last name
course_module_viewed - Fixed description

For this to be done properly, a new function to send the message
and trigger the event has been created. Following that a
data generator for chat, and some unit tests.