Small changes to the interface, so that it compiles fine on all platforms.

The transition to ptr<> based interface is in progress, but I won't do the
switch right away.

sources/core/plugins_manager.h

@@ -47,13 +47,6 @@ class plugins_manager
 		static
 #endif
 		function* get_function(const arguments& args) ;
-		
-		//! \brief get an instance of the function that is defined in the plugin with
-		//! filename n. Return null if no one exist.
-#ifdef USING_STATIC
-		static
-#endif
-		ptr<function> get_function(const arguments& args) ;
 
 		//! \brief load a function from the ALTA input file.
 #ifdef USING_STATIC

sources/core/ptr.h

@@ -14,7 +14,7 @@
 
 /* Checking for the presence of C++11 features like smart pointers. There
  * is no clean way to do it for all compilers. This method is supposed to
- * work with CLANG and GCC > 4.3.
+ * work with CLANG and GCC.
  *
  * See htpp://stackoverflow.com/questions/11886288/ 
  */