Move rx.util.functions to rx.functions

Eliminate dumping ground of rx.util

Author: benjchristensen

src/main/java/rx/operators/DebugSubscriber.java

@@ -3,9 +3,9 @@
 import rx.Observable.Operator;
 import rx.Observer;
 import rx.Subscriber;
+import rx.functions.Action1;
+import rx.functions.Func1;
 import rx.plugins.DebugNotification;
-import rx.util.functions.Action1;
-import rx.util.functions.Func1;
 
 public final class DebugSubscriber<T> extends Subscriber<T> {
     private final Func1<T, T> onNextHook;

src/main/java/rx/plugins/DebugHook.java

@@ -5,11 +5,11 @@
 import rx.Observable.Operator;
 import rx.Subscriber;
 import rx.Subscription;
+import rx.functions.Action1;
+import rx.functions.Actions;
+import rx.functions.Func1;
+import rx.functions.Functions;
 import rx.operators.DebugSubscriber;
-import rx.util.functions.Action1;
-import rx.util.functions.Actions;
-import rx.util.functions.Func1;
-import rx.util.functions.Functions;
 
 /**
  * Implements hooks into the {@link Observable} chain to emit a detailed account of all the events

src/test/java/rx/debug/DebugHookTest.java

@@ -15,12 +15,12 @@
 import rx.Notification;
 import rx.Observable;
 import rx.Observer;
+import rx.functions.Action1;
+import rx.functions.Func1;
 import rx.plugins.DebugHook;
 import rx.plugins.DebugNotification;
 import rx.plugins.PlugReset;
 import rx.plugins.RxJavaPlugins;
-import rx.util.functions.Action1;
-import rx.util.functions.Func1;
 
 public class DebugHookTest {
     @Before