A centralisation of feedback messages.
As I have already quietly mentioned, feedback is important to the user. So this module essentially exposes functions to produce strings of characters... for example, "Ah, this file was successfully created" or "Hmm, the task failed miserably with 'the error in question'".
At the moment it would seem (obviously) that a string is an ideal tool to display messages...
val target_need_to_be_built : Filepath.t -> tOccurs when a target need to be built.
val target_need_to_be_read : Filepath.t -> tOccurs when a target need to be read.
val target_is_up_to_date : Filepath.t -> tOccurs when a target is up to date.
val crap_there_is_an_exception : exn -> tOccurs when there is an exception.