Secrets_model::update() now checks to see if there is any data to update, before it updates.
* Corrected fatal issue where updating an entry over compensated and reduced or increased account value by double.
* Added missing entry id parameter to the Attachment_model::get_entry() call within the entry_get() method of the money_tracker controller.
* Deleted the user_key_get() method from the money_tracker controller. Not used.
* Corrected a SQL error within Entry_model::delete()
* Entry_model::save() now actually returning a value. Previously (accidentally) wasn't.
* Corrected some commented SQL queries, to help better understand what code is supposed to do.
* Entry_model::update() now ignoring certain data points, instead of ignoring the id and all "empty" values, and only updates when there is actually data available.