#1067 P25 Phase 1 C4FM/LSM decoder redesign. (#2294)

C4FM now uses SIMD differential decoding and soft sync detection.
LSM updated with soft sync detector and retains original Gardner error detector.
Adds new QPSK symbol view in the now playing channel tab.
Restores PLL error driven tuner Auto-PPM feature.
Deletes the demod viewer GUI application and all instrumented decoders
Updates DMR to send soft symbols to new symbol view in Now Playing.

Co-authored-by: Dennis Sheirer <dsheirer@github.com>

src/main/java/io/github/dsheirer/bits/BinaryMessage.java

@@ -243,6 +243,16 @@ public class BinaryMessage extends BitSet
         return mSize;
     }
 
+    /**
+     * Current size of the message indicating the quantity of bits that have been added to this message.  This value
+     * is less than or equal to the size() value.
+     * @return current size in bits.
+     */
+    public int currentSize()
+    {
+        return mPointer;
+    }
+
     public void setSize(int size)
     {
         mSize = size;