allow uppercase http methods

@@ -1357,7 +1357,8 @@ Casper.prototype.open = function open(location, settings) {
     // http method
     // taken from https://github.com/ariya/phantomjs/blob/master/src/webpage.cpp#L302
     var methods = ["get", "head", "put", "post", "delete"];
-    if (settings.method && (!utils.isString(settings.method) || methods.indexOf(settings.method) === -1)) {
+    var lowerCaseMethod = settings.method.toLowerCase();
+    if (settings.method && (!utils.isString(settings.method) || methods.indexOf(lowerCaseMethod) === -1)) {
         throw new CasperError("open(): settings.method must be part of " + methods.join(', '));
     }
     // http data

@@ -32,6 +32,25 @@ casper.test.begin('open() GET tests', 2, {
     }
 });
 
+casper.test.begin('open() GET casing tests', 2, {
+    setUp: setUp,
+    tearDown: tearDown,
+    test: function(test) {
+        casper.open('tests/site/index.html', {
+          method: 'GET'
+        }).then(function() {
+            test.pass("Casper.open() can open and load a location using GET");
+            test.assertEquals(usedSettings, {
+                method: "GET"
+            }, "Casper.open() used the expected GET settings");
+        });
+
+        casper.run(function() {
+            test.done();
+        });
+    }
+});
+
 casper.test.begin('open() POST tests', 2, {
     setUp: setUp,
     tearDown: tearDown,
@@ -56,6 +75,30 @@ casper.test.begin('open() POST tests', 2, {
     }
 });
 
+casper.test.begin('open() POST casing tests', 2, {
+    setUp: setUp,
+    tearDown: tearDown,
+    test: function(test) {
+        casper.open('tests/site/index.html', {
+            method: 'POST',
+            data:   {
+                plop: 42,
+                chuck: 'norris'
+            }
+        }).then(function() {
+            test.pass("Casper.open() can open and load a location using POST");
+            test.assertEquals(usedSettings, {
+                method: "POST",
+                data:   "plop=42&chuck=norris"
+            }, "Casper.open() used the expected POST settings");
+        });
+
+        casper.run(function() {
+            test.done();
+        });
+    }
+});
+
 casper.test.begin('open() PUT tests', 2, {
     setUp: setUp,
     tearDown: tearDown,
@@ -80,6 +123,30 @@ casper.test.begin('open() PUT tests', 2, {
     }
 });
 
+casper.test.begin('open() PUT casing tests', 2, {
+    setUp: setUp,
+    tearDown: tearDown,
+    test: function(test) {
+        casper.thenOpen('tests/site/index.html', {
+            method: 'PUT',
+            data:   {
+                plop: 42,
+                chuck: 'norris'
+            }
+        }).then(function() {
+            test.pass("Casper.open() can open and load a location using PUT");
+            test.assertEquals(usedSettings, {
+                method: "PUT",
+                data:   "plop=42&chuck=norris"
+            }, "Casper.open() used the expected PUT settings");
+        });
+
+        casper.run(function() {
+            test.done();
+        });
+    }
+});
+
 casper.test.begin('open() PUT tests', 2, {
     setUp: setUp,
     tearDown: tearDown,