Added tests
Added file reader
Added file reader
Changed exceptions
refactoring
modelo operation, cambio de nombre Enum, creacion de controladores de user y operation
modelo operation, cambio de nombre Enum, creacion de controladores de user y operation
Merge branch 'sammy' of https://github.com/ripflame/ProyectoSD into sammy
Merge branch 'sammy' into development
Refactoring