Fixing arduinoson problems by using singletons for syringe and syringefilled instead of static members.

Correection of the way to use arduinoJson structure, and cretio of a name attribute to use it as the key

 Deletion of setupJsonSyringe(filled) methods because they are repetitive of setter methods and would be called in the constructor, we don't need another method to do it.

Complete modification of the syringe class with basic functions (setters and getters) throough a Json document

the manageEmergency function