dev136 - Merge branch 'newDispatch' (PLEASE READ!)

the following changes have been made:
- a different strategy for DivDispatch audio output.
  - if you're working on a new chip, be sure to replace isStereo()
    with getOutputCount(). if isStereo() was true, return 2; otherwise
    1.
    do not return 0 or you will melt the oven!
  - additionally, the acquire() function has changed. it's now:
    `acquire(short** buf, size_t len)`
    replace bufL with buf[0] and bufR with buf[1].
    `start` is gone. if you really needed to use it, take a look at
    pcspkr.
    if you write to buf[1] and getOutputCount is 1, the oven will
    melt as well!
- support for more-than-stereo audio, with up to 16 outputs.
- a brand-new patchbay routing feature. arbitrarily route chip outputs
  to system outputs.

src/engine/platform/pokey.cpp

@@ -64,16 +64,16 @@ const char** DivPlatformPOKEY::getRegisterSheet() {
   return regCheatSheetPOKEY;
 }
 
-void DivPlatformPOKEY::acquire(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformPOKEY::acquire(short** buf, size_t len) {
   if (useAltASAP) {
-    acquireASAP(bufL, start, len);
+    acquireASAP(buf[0],len);
   } else {
-    acquireMZ(bufL, start, len);
+    acquireMZ(buf[0],len);
   }
 }
 
-void DivPlatformPOKEY::acquireMZ(short* buf, size_t start, size_t len) {
-  for (size_t h=start; h<start+len; h++) {
+void DivPlatformPOKEY::acquireMZ(short* buf, size_t len) {
+  for (size_t h=0; h<len; h++) {
     while (!writes.empty()) {
       QueuedWrite w=writes.front();
       Update_pokey_sound_mz(&pokey,w.addr,w.val,0);
@@ -93,14 +93,14 @@ void DivPlatformPOKEY::acquireMZ(short* buf, size_t start, size_t len) {
   }
 }
 
-void DivPlatformPOKEY::acquireASAP(short* buf, size_t start, size_t len) {
+void DivPlatformPOKEY::acquireASAP(short* buf, size_t len) {
   while (!writes.empty()) {
     QueuedWrite w=writes.front();
     altASAP.write(w.addr, w.val);
     writes.pop();
   }
 
-  for (size_t h=start; h<start+len; h++) {
+  for (size_t h=0; h<len; h++) {
     if (++oscBufDelay>=2) {
       oscBufDelay=0;
       buf[h]=altASAP.sampleAudio(oscBuf);