Add a few definitions. BehaviorSubject, ReplaySubject, ConnectableObservable

Fix definition around Subject.

rx.js/rx.js.binding.d.ts

@@ -15,14 +15,26 @@ declare module Rx {
 		new (bufferSize?: number, window?: number, scheduler?: IScheduler): ReplaySubject<T>;
 	}
 
+    var ReplaySubject: {
+        new <T>(bufferSize?: number, window?: number, scheduler?: IScheduler): ReplaySubject<T>;
+    }
+
 	interface BehaviorSubject<T> extends ISubject<T> {
 		new (initialValue: T): BehaviorSubject<any>;
 	}
 
+    var BehaviorSubject: {
+        new <T>(initialValue: T): BehaviorSubject<T>;
+    }
+
 	interface ConnectableObservable<T> extends IObservable<T>{
 		connect(): _IDisposable;
 		refCount(): IObservable<T>;
-	}
+    }
+
+    var ConnectableObservable: {
+        new <T>(): ConnectableObservable<T>;
+    }
 
 	interface IObservable<T> {
 

rx.js/rx.js.d.ts

@@ -430,13 +430,13 @@ declare module Rx {
 		dispose(): void;
 	}
 
-	export interface Subject {
-		create<T>(observer?: IObserver<T>, observable?: IObservable<T>): ISubject<T>;
-	}
+    export interface Subject<T> extends ISubject<T> {
+        create<T>(observer?: IObserver<T>, observable?: IObservable<T>): ISubject<T>;
+    }
 
-	var Subject: {
-		new<T> (): ISubject<T>;
-	}
+    var Subject: {
+        new <T>(): Subject<T>;
+    }
 
 	interface IAsyncSubject<T> extends IObservable<T>, IObserver<T> {
 		isDisposed: boolean;