Route /cities/ibge/:id removed also
Do not tell people I did that

EXAMPLE USAGE:

* Use it with no parameters to get all the dimensions in the query: `app.get('/', dimensions(), function(req, res, next){})`
* Use it with an array of accepted values: `app.get('/', dimensions(['year', 'location']), function(req, res, next){})`
* Use it globally: `app.use(dimensions())`

Related: #8

Signed-off-by: João Victor Tozatti Risso <jvtr12@c3sl.ufpr.br>

Signed-off-by: João Victor Tozatti Risso <jvtr12@c3sl.ufpr.br>

Closes #6

Signed-off-by: João Victor Tozatti Risso <jvtr12@c3sl.ufpr.br>

Signed-off-by: João Victor Tozatti Risso <jvtr12@c3sl.ufpr.br>

- Rename /matriculas to /enrollments
- Add initial support for parameters in the enrollments route

Related: #3

Signed-off-by: João Victor Tozatti Risso <jvtr12@c3sl.ufpr.br>

Implement the following aggregations:
- per-state
- per-region
- country

In order to use these queries one should use the /api/v1/matriculas route. When
the 'agregar' query parameter is set, one could use the values 'estado' and 'regiao'
to run the aggregation for state and region, respectively. Otherwise, if no parameters
are supplied, it defaults to the whole country aggregation query.

Not following any specs