[PT] Translation of Ecto/Changesets (#1731)
[PT] Translation of Ecto/Changesets (#1731)

* added the initial introduction of changeset

* translation of Creating your first changeset

* Translation of Validations

* Translation of Custom validations

* Translation of Adding changes programatically

* Conclusion

* Translation of Conclusion

* bug fixes found in the review

nscyclone/elixir-school,doomspork/elixir_school,doomspork/elixir-school,doomspork/elixir-school,doomspork/elixir-school,doomspork/elixir_school,nscyclone/elixir-school,nscyclone/elixir-school,doomspork/elixir_school,nscyclone/elixir-school