Use unbounded ReplaySubject

Fixes RxSwiftCommunity#3 by using RxSwift's newly included `createUnbounded()` factory
method.

Action.swift

@@ -77,9 +77,7 @@ public extension Action {
     public func execute(input: Input) -> Observable<Element> {
 
         // Buffer from the work to a replay subject.
-        // TODO: The buffer size is set to ten because ten is "big enough"
-        // We're tracking this here: https://github.com/ashfurrow/Action/issues/3
-        let buffer = ReplaySubject<Element>.create(bufferSize: 10)
+        let buffer = ReplaySubject<Element>.createUnbounded()
 
         // See if we're already executing.
         var startedExecuting = false

Demo/Podfile.lock

@@ -1,14 +1,14 @@
 PODS:
-  - Action (0.2.0):
+  - Action (0.3.0):
     - RxCocoa (~> 2.0.0-beta)
     - RxSwift (~> 2.0.0-beta)
   - Nimble (3.0.0)
   - Quick (0.8.0)
-  - RxBlocking (2.0.0-beta.3):
+  - RxBlocking (2.0.0-beta.4):
     - RxSwift (~> 2.0.0-beta)
-  - RxCocoa (2.0.0-beta.3):
+  - RxCocoa (2.0.0-beta.4):
     - RxSwift (~> 2.0.0-beta)
-  - RxSwift (2.0.0-beta.3)
+  - RxSwift (2.0.0-beta.4)
 
 DEPENDENCIES:
   - Action (from `../`)
@@ -23,11 +23,11 @@ EXTERNAL SOURCES:
     :path: "../"
 
 SPEC CHECKSUMS:
-  Action: 836da3ae9615435467a3d1cddd384f4ea6036ba2
+  Action: da3ac4ae245c10f909fd07db34680a90beb4aa21
   Nimble: 4c353d43735b38b545cbb4cb91504588eb5de926
   Quick: 563d0f6ec5f72e394645adb377708639b7dd38ab
-  RxBlocking: 331f8bdedf77198f8ff1a37f09c492f1f4f631e5
-  RxCocoa: 1472006304b296d03c847f78b21384523cc4902e
-  RxSwift: 19fbe885b404d1d36d42ac8535134739a9b42952
+  RxBlocking: 234b0c161315ff3ade25c11e48d74e9ca83158b5
+  RxCocoa: 4a3e433e6dfe116362ff54423c841cc0f209e009
+  RxSwift: 191c6b06da783a8671433cf35a54d2ad2fd2d9de
 
 COCOAPODS: 0.39.0