stoped directly access to plugin files
added the simulator option
created a initial form
added the simulator initial scripts and updated the form
updated the classes to generate the simulator
created a method to set the debug mode in Correios API class
initial caculate class creation
renamed the WC_Correios_Package class
improved the package class
updated the inline documentation
created the WC_Correios_API::set_package()
improved the correios classes to get some abstration
improved the simulator classe
added methods to display the shipping rate in the simulator
added a method to get the variation rate in the shipping simulator
added the calcule of the product quantity in shipping simulator
improved the simulator class
added method to test with the simulator is enabled
updated the plugin strings and translation
updated the simulator script to clean the simulator in variation change