improve doxygen, remove license from doxygen comment block

COAST/COASTProcess.cc

-/**
+
+/*
  * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
  *
  * See file AUTHORS for a list of contributors.

COAST/COASTProcess.h

+
+/*
+ * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
+ *
+ * See file AUTHORS for a list of contributors.
+ *
+ * This software is distributed under the terms of the GNU General Public
+ * Licence version 3 (GPL Version 3). See file LICENSE for a full version of
+ * the license.
+ */
+
 #ifndef _include_corsika_coast_coastprocess_h_
 #define _include_corsika_coast_coastprocess_h_
 

COAST/COASTStack.h

 
-/**
+/*
  * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
  *
  * See file AUTHORS for a list of contributors.

COAST/COASTUserLib.cc

+
+/*
+ * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
+ *
+ * See file AUTHORS for a list of contributors.
+ *
+ * This software is distributed under the terms of the GNU General Public
+ * Licence version 3 (GPL Version 3). See file LICENSE for a full version of
+ * the license.
+ */
+
 #include <interface/CorsikaInterface.h>
 
 #include <corsika/coast/COASTProcess.h>

COAST/ParticleConversion.cc

 
-/**
+/*
  * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
  *
  * See file AUTHORS for a list of contributors.

COAST/ParticleConversion.h

 
-/**
+/*
  * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
  *
  * See file AUTHORS for a list of contributors.

Documentation/Examples/cascade_example.cc

-/**
+
+/*
  * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
  *
  * See file AUTHORS for a list of contributors.

Documentation/Examples/geometry_example.cc

 
-/**
+/*
  * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
  *
  * See file AUTHORS for a list of contributors.

Documentation/Examples/helix_example.cc

 
-/**
+/*
  * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
  *
  * See file AUTHORS for a list of contributors.

Documentation/Examples/logger_example.cc

 
-/**
+/*
  * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
  *
  * See file AUTHORS for a list of contributors.

Documentation/Examples/stack_example.cc

 
-/**
+/*
  * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
  *
  * See file AUTHORS for a list of contributors.

Documentation/Examples/staticsequence_example.cc

 
-/**
+/*
  * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
  *
  * See file AUTHORS for a list of contributors.

Environment/Environment.h

-/**
+
+/*
  * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
  *
  * See file AUTHORS for a list of contributors.

Environment/FlatAtmosphere/FlatAtmosphere.h

 
-/**
+/*
  * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
  *
  * See file AUTHORS for a list of contributors.
@@ -8,3 +8,4 @@
  * Licence version 3 (GPL Version 3). See file LICENSE for a full version of
  * the license.
  */
+

Environment/HomogeneousMedium.h

-/**
+
+/*
  * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
  *
  * See file AUTHORS for a list of contributors.

Environment/IMediumModel.h

 
-/**
+/*
  * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
  *
  * See file AUTHORS for a list of contributors.

Environment/NuclearComposition.h

 
-/**
+/*
  * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
  *
  * See file AUTHORS for a list of contributors.

Environment/VolumeTreeNode.h

-/**
+
+/*
  * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
  *
  * See file AUTHORS for a list of contributors.

Environment/testEnvironment.cc

-/**
+
+/*
  * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
  *
  * See file AUTHORS for a list of contributors.

Framework/Cascade/Cascade.h

 
-/**
+/*
  * (c) Copyright 2018 CORSIKA Project, corsika-project@lists.kit.edu
  *
  * See file AUTHORS for a list of contributors.