Fix error handling in CoffeeScript MVC's express.coffee
Fix error handling in CoffeeScript MVC's express.coffee

The error handlers were defined improperly, leading them to be ignored
on 404's and the like. I copied the code from the app.coffee in the
basic structure to replace it.

bernardhamann/generator-yebobase,markogresak/generator-express,SteveCastle/generator-express,markogresak/generator-express,VictorParraCant/generator-express,SteveCastle/generator-express,f3rnando/generator-express,VictorParraCant/generator-express,madtec-dev/generator-madtec,petecoop/generator-express,Atrox/generator-express,f3rnando/generator-express,madtec-dev/generator-madtec,jsdevel/generator-express-swagger,bernardhamann/generator-yebobase,Atrox/generator-express