responding to edits

[melody-notpond]

performing a command such as classy query 496 and then editting it to classy query cs 496 should remove the original response and generate a new response

[GabrielDTB]

It should be possible to edit the existing response when a message that triggered a response is edited. It should be a simple case keeping a map of commands to response and handling edits. This will take some refactoring though to avoid copy pasting code. Should also add a limit to the size of the map avoid taking too much memory.