Merge remote-tracking branch 'origin/tk418' into tk418-Jamil
Get only the issue of a specific journal in  PressReleaseForm
Verificando somente se existe o param instance
Adicionado na view add_prelease a rotina para criar e atualizar os press releases
Ajuste do breadcrump no template add_pressrelease
Adicionando as funcionalidades básicas do formulário de Press Release
Merge branch 'tk418' of github.com:scieloorg/SciELO-Manager into tk418
Merge branch 'tk418' of github.com:scieloorg/SciELO-Manager into tk418
Ajustes nas migrações