Make stdlib

* Build the standard library as a module .so
 * Locate and load lib at runtime as a module
   if it is not provided to the ChaiScript
   constructor.

Decreases compile time by 1/2 for common use cases
where the user can use the dynamic library module.

include/chaiscript/chaiscript_defines.hpp

@@ -16,5 +16,13 @@
 #define CHAISCRIPT_WINDOWS
 #endif
 
+
+#ifdef  CHAISCRIPT_HAS_DECLSPEC
+#define CHAISCRIPT_MODULE_EXPORT extern "C" __declspec(dllexport)
+#else
+#define CHAISCRIPT_MODULE_EXPORT extern "C" 
+#endif
+
+
 #endif