Removed one Thread.interrupted check, and added some more documentation

Author: cogmission

src/main/java/org/numenta/nupic/network/Layer.java

@@ -846,10 +846,6 @@ public void run() {
 
                     Layer.this.compute((T)intArray);
 
-                    if(Thread.currentThread().isInterrupted()) {
-                        notifyError(new RuntimeException("Unknown Exception during compute"));
-                    }
-                    
                     // Notify all downstream observers that the stream is closed
                     if(!sensor.hasNext()) {
                         notifyComplete();
@@ -1207,6 +1203,11 @@ void notifyComplete() {
         publisher.onCompleted();
     }
 
+    /**
+     * Called internally to propagate the specified {@link Exception}
+     * up the network hierarchy
+     * @param e the exception to notify users of
+     */
     void notifyError(Exception e) {
         for(Observer<Inference> o : subscribers) {
             o.onError(e);