Fixing the last of the const change issues
Fixing the last of the const change issues

kamilzubair/ChaiScript,lefticus/ChaiScript,bradparks/ChaiScript__cplusplus_scripting_language,lefticus/ChaiScript,kamilzubair/ChaiScript,bradparks/ChaiScript__cplusplus_scripting_language,lefticus/ChaiScript,bradparks/ChaiScript__cplusplus_scripting_language,kamilzubair/ChaiScript