Made some corrections in the documentation

src/gui/model/project.cpp

@@ -1,5 +1,5 @@
 /*
-  panel.cpp  -  Implementation of the Project class
+  project.cpp  -  Implementation of the Project class
  
   Copyright (C)         Lumiera.org
     2008,               Joel Holdsworth <joel@airwebreathe.org.uk>

src/gui/model/project.hpp

@@ -21,7 +21,7 @@
 */
 /** @file project.hpp
  ** This file contains the definition of Project, a class which
- ** store project data, and wraps proc layer data
+ ** stores project data, and wraps proc layer data
  */
 
 #ifndef PROJECT_HPP