#1 Delay displaying of characters/words

[acerion]

I've got a request from user: he would like to see a change made to cw program.
A character read from a file (-f option) and played through audio system should be displayed on screen only after after it has been played by audio system, not before being played.

With simple modification to cw.c the character can be displayed when the last dot/dash is being played by audio system, but this is not enough: the character should be played after the final dot/dash has been played.

This change should include possibility to delay displaying of whole words: read a word, play a word, display the word.