Reducing audio buffer size reducing lag

Now the ctrl+c reaction is faster.
Adds some precision to the README

README

 
 From an original idead from https://github.com/erlehmann/libglitch
 
+yaglitch is a 8 bits sonds generator based on a stack machine interpreting
+mathematical expression in reverse polish notation.
+
 Glitch file format is documented in FORMAT-draft-erlehmann copied from the
 repo above.
 

yaglitch.asm

 		dw AUDIO_U8 ; format
 		db 1 ; channels
 		db 0 ; silence
-		dw 4096 ; samples
+		dw 1024 ; samples
 		dd 0 ; size
 	dw 0 ; allign
 		dq audio_cllbck