Merge pull request JamesRandall#23 from vvmoppescapita/master

Made nonce and autoGenerateNonce optional, like the comments suggests they are

Author: JamesRandall

dist/angularJsOAuth2.js

@@ -245,8 +245,8 @@
 				signOutUrl: '@',				// url on the authorization server for logging out. Local token is deleted even if no URL is given but that will leave user logged in against STS
 				signOutAppendToken: '@',		// defaults to 'false', set to 'true' to append the token to the sign out url
 				signOutRedirectUrl: '@',		// url to redirect to after sign out on the STS has completed
-				nonce: '@',						// nonce value, optional. If unspecified or an empty string and autoGenerateNonce is true then a nonce will be auto-generated
-				autoGenerateNonce: '='		    // Should a nonce be autogenerated if not supplied. Optional and defaults to true.
+				nonce: '@?',					// nonce value, optional. If unspecified or an empty string and autoGenerateNonce is true then a nonce will be auto-generated
+				autoGenerateNonce: '=?'		    // Should a nonce be autogenerated if not supplied. Optional and defaults to true.
 		    }
 		};