Add && and || operator short-circuiting
Add && and || operator short-circuiting

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