Add documentation to the set_state get_state functions

include/chaiscript/language/chaiscript_engine.hpp

@@ -345,6 +345,11 @@ namespace chaiscript
             typename Eval_Engine::State engine_state;
         };
 
+        /**
+         * Returns a state object that represents the current
+         * set of loaded files, the set of global variables and
+         * the set of initialized functions
+         */
         State get_state()
         {
             boost::lock_guard<boost::recursive_mutex> l(use_mutex);
@@ -356,6 +361,9 @@ namespace chaiscript
             return s;
         }
 
+        /**
+         * Restores the state from a saved State object.
+         */
         void set_state(const State &t_state)
         {
             boost::lock_guard<boost::recursive_mutex> l(use_mutex);