Adds a class to securize parameters received

The new class have a method to compare parameters with a regular expresion.
Modifies name to DBaccess methods.

Modifies name to DBaccess methods to homogenize language
Add the first approach to use case getRecipe

Now get a basic parameters to Recipe, these parameters are on RECIPE
table in database
Adds getRecipe to the API method.

Now getRecipe returns a JSON recipe with ingredients.
Merge branch 'backend' of https://github.com/josecriane/cookingcheats into backend
Merge branch 'master' of https://github.com/josecriane/cookingcheats
Merge branch 'master' of https://github.com/josecriane/cookingcheats