TACS support (variations added to AMPS code)

These are:

- Bandwidth only 25 KHz, so lower deviations
- Data rate only 8000 KHz
- SID is called AID (Area ID)
- MIN1 coding is different

README

@@ -8,6 +8,7 @@ and from mobile phone. Currently supported networks:
  * C-Netz
  * NMT 450 (Nordic Mobile Telephone)
  * AMPS (Advanced Mobile Phone System)
+ * TACS (Total Access Communication System)
 
 
 USE AT YOUR OWN RISK!
@@ -45,3 +46,5 @@ Association."
 Eric from Smart Card World and Karsten Niehusen from cardomatic.de for
 providing memory cards to be programmed for older C-Netz phone.
 
+Dieter Spaar prividing TACS recordings to verify and debug TACS support.
+