Some code refactoring + updated the README file.

Author: lordmulder

Contrib/StdUtils/include/ansi/nsis/pluginapi.h

@@ -8,7 +8,7 @@ extern "C" {
 #include "api.h"
 
 #undef _UNICODE
-#include "..\..\unicode\nsis\nsis_tchar.h"
+#include "../common/nsis_tchar.h"
 
 #ifndef NSISCALL
 #  define NSISCALL __stdcall