Issue #24 - refactoring FundingCheckingPipe
Merge branch 'master' of git://github.com/scieloorg/balaio into 24

Conflicts:
	balaio/tests/test_validator.py
	balaio/validator.py
Issue #24 improvements
Ajuste em import relativo
Merge remote-tracking branch 'roberta/24' into rev-roberta
Issue #24 corrigindo erro de indice do funding_group[0]
Merge remote-tracking branch 'roberta/24' into rev-roberta
Merge branch 'master' of github.com:scieloorg/balaio
Adicionado funções para validação do ISSN