[Sorting feature] First prototype of sorting feature

[Rodolfodc]

This code is the initial proposal of the sorting feature.

This Code follows the suggestion of ordering by the following sequence:

1. data
2. variable
3. resource
4. misc

Please, let me know if you don't agree with this initial step, we are here to improve and make things work better, and don't forget that we will come back in this feature to implement new steps and improve it's usability.