Inserting in meta, previous and next resource uri
Merge branch 'master' of git://github.com/scieloorg/balaio into 133_next_previous
Removing blank lines
Refactored
Merge branch 'master' of git://github.com/scieloorg/balaio into 133_next_previous
Refactoring of next and previous resource_uri
adjustments for next and previous resource uri
including filters to meta
Add filters to resource uri (next and previous)
total_count is the total of the query result
changed _int to _positive_int
_int_positive to _N (natural numbers)
ArticlePkg: tickets and attempts are displayed as list of resource uri
Tickets: comments as a list of {author, message, date}.
Changed add_meta to format_response. Because it formats the response: adding resource uri, but only if there is a list of objects, it also adds meta.
Changed content of add_resource_uri. Previously it added resouces uri to one object or to a list of objects, but now it adds resources uri to an object.
Adjustments in test_renderer
appending checkin and validations (which are Checkpoint) to Attempt.
Adding checkin and validation to Attempt.to_dict(). #133
Clean unnecessary comments
Changing total_count in docs and in code to total.
Ajustes no código
Resolução de conflitos
Ajustes de acordo com comentarios de revisão
Merge branch 'master' of git://github.com/scieloorg/balaio into 133_related_resources

Conflicts:
	balaio/renderers.py
	balaio/tests/test_renderer.py