Fix Property BindableType conformance.

Author: srdanrasic

ReactiveKit.podspec

@@ -1,12 +1,12 @@
 Pod::Spec.new do |s|
   s.name             = "ReactiveKit"
-  s.version          = "2.0.0-beta1"
+  s.version          = "2.0.0-beta2"
   s.summary          = "A Swift Reactive Programming Framework"
   s.description      = "ReactiveKit is a collection of Swift frameworks for reactive and functional reactive programming."
   s.homepage         = "https://github.com/ReactiveKit/ReactiveKit"
   s.license          = 'MIT'
   s.author           = { "Srdan Rasic" => "[email protected]" }
-  s.source           = { :git => "https://github.com/ReactiveKit/ReactiveKit.git", :tag => "v2.0.0-beta1" }
+  s.source           = { :git => "https://github.com/ReactiveKit/ReactiveKit.git", :tag => "v2.0.0-beta2" }
 
   s.ios.deployment_target       = '8.0'
   s.osx.deployment_target       = '10.9'

Sources/Property.swift

@@ -67,6 +67,10 @@ extension Property: BindableType {
   /// Can accept a disposable that will be disposed on receiver's deinit.
   public func observer(disconnectDisposable: Disposable) -> StreamEvent<T> -> () {
     disposeBag.addDisposable(disconnectDisposable)
-    return { [weak self] in self?.subject.on($0) }
+    return { [weak self] event in
+      if let value = event.element {
+        self?.value = value
+      }
+    }
   }
 }