Including tickets in packages api
Including tickets in the response of packages and package
Merge pull request #98 from robertatakenaka/80_doc

Including tickets in the response of packages API (#80)
Tests of parse_issue_tag
Merge branch 'master' of git://github.com/scieloorg/balaio into 85
Including supplement to issue identification (Issue #85)

1. Included supplement of volume and number to ArticlePkg
2. Included supplement of volume and number to ArticlePkgStub
3. Included supplement in SPSMixin.meta, which uses new functions created in utils module.
4. Included supplement of volume and number in the filter of scieloapi.issues to use in SetupPipe
5. Tests