Merge pull request #14 from angelodipaolo/url-request-http-method-readonly

Change NSURLRequest's HTTPMethod stub to readonly

Author: parkera

Foundation/NSURLRequest.swift

@@ -243,7 +243,7 @@ public class NSURLRequest : NSObject, NSSecureCoding, NSCopying, NSMutableCopyin
     @abstract Returns the HTTP request method of the receiver.
     @result the HTTP request method of the receiver.
     */
-    public var HTTPMethod: String? { get { NSUnimplemented() } set { NSUnimplemented() } }
+    public var HTTPMethod: String? { get { NSUnimplemented() }}
 
     /*!
     @method allHTTPHeaderFields
@@ -322,6 +322,13 @@ public class NSMutableURLRequest : NSURLRequest {
     */
     /*@NSCopying*/ public override var mainDocumentURL: NSURL? { get { NSUnimplemented() } set { NSUnimplemented() } }
 
+    /*!
+        @method HTTPMethod
+        @abstract Sets the HTTP request method of the receiver.
+        @result the HTTP request method of the receiver.
+    */
+    public override var HTTPMethod: String? { get { NSUnimplemented() } set { NSUnimplemented() } }
+    
     /*!
         @method setValue:forHTTPHeaderField:
         @abstract Sets the value of the given HTTP header field.