closes #173 - Added support for settings to casper.thenOpen

Contributed by @malendrew

@@ -1269,10 +1269,14 @@ Casper.prototype.thenEvaluate = function thenEvaluate(fn, context) {
  * @return Casper
  * @see    Casper#open
  */
-Casper.prototype.thenOpen = function thenOpen(location, then) {
+Casper.prototype.thenOpen = function thenOpen(location, settings, then) {
     "use strict";
+    if (!(settings && !utils.isFunction(settings))) {
+      then = settings;
+      settings = null;
+    }
     this.then(this.createStep(function _step() {
-        this.open(location);
+        this.open(location, settings);
     }, {
         skipLog: true
     }));

@@ -22,7 +22,31 @@ var t = casper.test, current = 0, tests = [
             username: 'bob',
             password: 'sinclar'
         }, "Casper.open() used the expected HTTP auth settings");
-    }
+    },
+    function(settings) {
+        t.assertEquals(settings, {
+            method: "get"
+        }, "Casper.thenOpen() used the expected GET settings");
+    },
+    function(settings) {
+        t.assertEquals(settings, {
+            method: "post",
+            data:   "plop=42&chuck=norris"
+        }, "Casper.thenOpen() used the expected POST settings");
+    },
+    function(settings) {
+        t.assertEquals(settings, {
+            method: "put",
+            data:   "plop=42&chuck=norris"
+        }, "Casper.thenOpen() used the expected PUT settings");
+    },
+    function(settings) {
+        t.assertEquals(settings, {
+            method: "get",
+            username: 'bob',
+            password: 'sinclar'
+        }, "Casper.thenOpen() used the expected HTTP auth settings");
+    },
 ];
 
 casper.start();
@@ -67,7 +91,43 @@ casper.open('tests/site/index.html', {
     t.pass("Casper.open() can open and load a location using HTTP auth");
 });
 
+// GET with thenOpen
+casper.thenOpen('tests/site/index.html').then(function() {
+    t.pass("Casper.thenOpen() can open and load a location using GET");
+});
+
+// POST with thenOpen
+casper.thenOpen('tests/site/index.html', {
+    method: 'post',
+    data:   {
+        plop: 42,
+        chuck: 'norris'
+    }
+}, function() {
+    t.pass("Casper.thenOpen() can open and load a location using POST");
+});
+
+// PUT with thenOpen
+casper.thenOpen('tests/site/index.html', {
+    method: 'put',
+    data:   {
+        plop: 42,
+        chuck: 'norris'
+    }
+}, function() {
+    t.pass("Casper.thenOpen() can open and load a location using PUT");
+});
+
+// HTTP Auth with thenOpen
+casper.thenOpen('tests/site/index.html', {
+    method: 'get',
+    username: 'bob',
+    password: 'sinclar'
+}, function() {
+    t.pass("Casper.thenOpen() can open and load a location using HTTP auth");
+});
+
 casper.run(function() {
     this.removeAllListeners('open');
     t.done();
-});
+});
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