Unicampi

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**API**

* Add all institutes to `/institutes` endpoint.

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**API**

* Course requirements now are presented as an array of objects
containing a list "OR" disciplines.
* Courses now have a "turmas" attribute corresponding to the current
term classes (fixes 6).
* Courses and Institutes now match term info to comply with the crawled data.
* Courses and Institutes now come before term on endpoints.
* Moved `/oferecimentos` to `/disciplina/{disciplina}/.../turmas`.
* Replace attribute `créditos` with `creditos`.

**Bug fixes**

* Courses with no requirements now have a list of empty requirements
(fixes 35).

**Internals**

* Rename `Courses -> ActiveCourses` and `Institutes -> ActiveInstitutes`.
* Rename `Offerings -> Lectures`.

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* "turma" in `/periodos/2016s2/oferecimentos/MC878/turma/a/matriculados`
changes to its plural form "turmas".
* Parameters pre-processing (including sensitivity) are now declared
in the views themselves, through the attribute `route_parameters`.

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* Started tracking.