Use constexpr where possible in user_type() functions  - Task #52  - Gives some performance improvement
Use constexpr where possible in user_type() functions
 - Task #52
 - Gives some performance improvement

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