Removed "wontfix" TODOs.

* Perspective is done in Camera itself, FBO postprocessing is user's job
  (yep, via subclassing).
* Magnum won't probably support Euler angles at all, only quaternions.
  http://twitter.com/ID_AA_Carmack/statuses/187964611159539712

src/Camera.h

@@ -29,9 +29,7 @@
 namespace Magnum {
 
 /**
- * @brief %Camera object
- *
- * @todo Subclasses - perspective, FBO postprocessing etc.
+@brief %Camera object
  */
 class MAGNUM_EXPORT Camera: public Object {
     public:

src/Math/Matrix4.h

@@ -25,11 +25,10 @@
 namespace Magnum { namespace Math {
 
 /**
- * @brief 4x4 matrix
- *
- * @todo Rotation with Euler angles
- * @todo Shearing
- * @todo Reflection
+@brief 4x4 matrix
+
+@todo Shearing
+@todo Reflection
  */
 template<class T> class Matrix4: public Matrix<T, 4> {
     public: