Fixed a few typos in docs (ahem).

src/DebugTools/Profiler.h

@@ -63,7 +63,7 @@ p.enable();
 void MyApplication::drawEvent() {
     p.start();
 
-    // ... misc stuff belogning to "Other" section
+    // ... misc stuff belonging to "Other" section
 
     p.start(sections.ai);
 

src/SceneGraph/FeatureGroup.h

@@ -56,7 +56,7 @@ class FeatureGroup {
         /**
          * @brief Destructor
          *
-         * Removes all features belogning to this group, but not deletes them.
+         * Removes all features belonging to this group, but not deletes them.
          */
         inline virtual ~FeatureGroup() {
             for(auto i: features) i->_group = nullptr;