New Features:
* Error message can exit the process.
* New Class Tasks For managing task loggers. It allows to measure time intervals of execution.
* New Class Process. For managing different layers of processors.
* New Class Logger. For administrating the files and the outputs. (WIP)
TODO:
* Allow raising errors and catch some of them.
* Communication between processes.
* Control deletion of tasks.
* Manage better the names, delete scope attribute.