Add test authentication task.

It doesn't actually do anything with the server's reply yet.

logic/auth/AuthenticateTask.h

@@ -0,0 +1,44 @@
+/* Copyright 2013 MultiMC Contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <logic/auth/YggdrasilTask.h>
+
+#include <QObject>
+#include <QString>
+#include <QJsonObject>
+
+/**
+ * The authenticate task takes a MojangAccount with no access token and password and attempts to authenticate with Mojang's servers.
+ * If successful, it will set the MojangAccount's access token.
+ */
+class AuthenticateTask : public YggdrasilTask
+{
+Q_OBJECT
+public:
+	AuthenticateTask(MojangAccount* account, const QString& password, QObject* parent=0);
+
+protected:
+	virtual QJsonObject getRequestContent() const;
+	
+	virtual QString getEndpoint() const;
+
+	virtual bool processResponse(QJsonObject responseData);
+
+private:
+	QString m_password;
+};
+