Extension to add Global Error Handler/Response Handler

[shravan20]

Idea:

Add an option to extend a internal global error handler and response envelope wrapper.

This basically wraps the response into a wrapper and automatically takes care of the error and how's it wrapped into json.

Like wise for success responses too.

[sbrsubuvga]

` app.use(function(err,req,res,next){
if(err.name=='UnauthorizedError') {
return res.status(401).send({status:'error',msg:'Authentication failed'});
}
else{
return res.status(500).send({status:'error',msg:'Internal Server Error'});
}

})`

[kisshan13]

Don''t worry i'm working on same. A package named exhancer you can check here... https://github.com/kisshan13/exhancer.js