change default form method from POST to GET

per HTML spec
http://www.w3.org/TR/html401/interact/forms.html#h-17.3

Author: mislav

src/rails.js

@@ -19,20 +19,20 @@
 			dataType = element.attr('data-type') || ($.ajaxSettings && $.ajaxSettings.dataType);
 
 		if (element.is('form')) {
-			method = element.attr('method') || 'POST';
+			method = element.attr('method');
 			url = element.attr('action');
 			data = element.serializeArray();
 			// memoized value from clicked submit button
 			var button = element.data('ujs:submit-button');
 			if (button) data.push(button);
 		} else {
-			method = element.attr('data-method') || 'GET';
+			method = element.attr('data-method');
 			url = element.attr('href');
 			data = null;
 		}
 
 		$.ajax({
-			url: url, type: method, data: data, dataType: dataType,
+			url: url, type: method || 'GET', data: data, dataType: dataType,
 			// stopping the "ajax:beforeSend" event will cancel the ajax request
 			beforeSend: function(xhr, settings) {
 				if (settings.dataType === undefined) {

test/public/test/call-remote.js

@@ -41,16 +41,16 @@ test('form method is not read from "data-method" attribute in case of missing "m
   build_form({ 'data-method': 'put' });
 
   submit(function(e, data, status, xhr) {
-    App.assert_post_request(data.request_env);
+    App.assert_get_request(data.request_env);
   });
 });
 
-test('form default method is POST', function() {
+test('form default method is GET', function() {
   expect(1);
   build_form();
 
   submit(function(e, data, status, xhr) {
-    App.assert_post_request(data.request_env);
+    App.assert_get_request(data.request_env);
   });
 });