Importing of session.

Session.h

@@ -11,32 +11,43 @@ public:
     Session();
     ~Session();
 
-    // add or remove sources
+    // add given source into the session
     SourceList::iterator addSource (Source *s);
+
+    // delete the source s from the session
     SourceList::iterator deleteSource (Source *s);
 
+    // get ptr to front most source and remove it from the session
+    // Does not delete the source
+    Source *popSource();
+
     // management of list of sources
+    bool empty() const;
+    uint numSource() const;
     SourceList::iterator begin ();
     SourceList::iterator end ();
     SourceList::iterator find (int index);
-    int index (SourceList::iterator it) const;
     SourceList::iterator find (Source *s);
     SourceList::iterator find (std::string name);
     SourceList::iterator find (Node *node);
-    uint numSource() const;
+    int index (SourceList::iterator it) const;
 
-    // update all sources and return the list of source which failed
+    // update all sources and mark sources which failed
     void update (float dt);
+
+    // return the last source which failed
     Source *failedSource() { return failedSource_; }
 
-    // result of render
+    // get frame result of render
     inline FrameBuffer *frame () const { return render_.frame(); }
+
+    // configure rendering resolution
     void setResolution(glm::vec3 resolution);
 
     // configuration for group nodes of views
     inline Group *config (View::Mode m) const { return config_.at(m); }
 
-    // name of file containing this session
+    // name of file containing this session (for transfer)
     void setFilename(const std::string &filename) { filename_ = filename; }
     std::string filename() const { return filename_; }