Fixed doxygen reference/label typo and added a missing "using" clause

src/framework/AbstractGraphicsEngine.h

@@ -25,7 +25,7 @@
 #include "Resource.h"
 
 /**
- * \addtogroup framwork Framework
+ * \addtogroup framework Framework
  * @{
  */
 

src/framework/BOINCClientAdapter.h

@@ -31,7 +31,7 @@
 using namespace std;
 
 /**
- * \addtogroup framwork Framework
+ * \addtogroup framework Framework
  * @{
  */
 

src/framework/GraphicsEngineFactory.h

@@ -25,7 +25,7 @@
 #include "StarsphereS5R3.h"
 
 /**
- * \addtogroup framwork Framework
+ * \addtogroup framework Framework
  * @{
  */
 

src/framework/Resource.h

@@ -27,7 +27,7 @@
 using namespace std;
 
 /**
- * \addtogroup framwork Framework
+ * \addtogroup framework Framework
  * @{
  */
 

src/framework/ResourceFactory.h

@@ -27,8 +27,10 @@
 
 #include "Resource.h"
 
+using namespace std;
+
 /**
- * \addtogroup framwork Framework
+ * \addtogroup framework Framework
  * @{
  */
 

src/framework/WindowManager.h

@@ -36,7 +36,7 @@
 using namespace std;
 
 /**
- * \addtogroup framwork Framework
+ * \addtogroup framework Framework
  * @{
  */