rails4: Default locale to en if not set
rails4: Default locale to en if not set

I18n.locale does not accept nil

EcoAlternative/noosfero-ecosol,vfcosta/noosfero,samasti/noosfero,evandrojr/noosfero,alexandreab/noosfero,alexandreab/noosfero,coletivoEITA/noosfero-ecosol,blogoosfero/noosfero,samasti/noosfero,macartur/noosfero,evandrojr/noosfero,larissa/noosfero,macartur/noosfero,tallysmartins/noosfero,blogoosfero/noosfero,blogoosfero/noosfero,CIRANDAS/noosfero-ecosol,alexandreab/noosfero,evandrojr/noosfero,larissa/noosfero,EcoAlternative/noosfero-ecosol,macartur/noosfero,arthurmde/noosfero,LuisBelo/tccnoosfero,tallysmartins/noosfero,macartur/noosfero,blogoosfero/noosfero,alexandreab/noosfero,evandrojr/noosfero,tallysmartins/noosfero,blogoosfero/noosfero,tallysmartins/noosfero,marcosronaldo/noosfero,coletivoEITA/noosfero-ecosol,LuisBelo/tccnoosfero,arthurmde/noosfero,blogoosfero/noosfero,AlessandroCaetano/noosfero,tallysmartins/noosfero,EcoAlternative/noosfero-ecosol,marcosronaldo/noosfero,samasti/noosfero,marcosronaldo/noosfero,LuisBelo/tccnoosfero,AlessandroCaetano/noosfero,AlessandroCaetano/noosfero,evandrojr/noosfero,CIRANDAS/noosfero-ecosol,tallysmartins/noosfero,LuisBelo/tccnoosfero,alexandreab/noosfero,coletivoEITA/noosfero-ecosol,vfcosta/noosfero,EcoAlternative/noosfero-ecosol,AlessandroCaetano/noosfero,alexandreab/noosfero,AlessandroCaetano/noosfero,larissa/noosfero,arthurmde/noosfero,samasti/noosfero,larissa/noosfero,arthurmde/noosfero,tallysmartins/noosfero,AlessandroCaetano/noosfero,evandrojr/noosfero,marcosronaldo/noosfero,macartur/noosfero,CIRANDAS/noosfero-ecosol,alexandreab/noosfero,LuisBelo/tccnoosfero,macartur/noosfero,larissa/noosfero,coletivoEITA/noosfero-ecosol,EcoAlternative/noosfero-ecosol,larissa/noosfero,vfcosta/noosfero,CIRANDAS/noosfero-ecosol,marcosronaldo/noosfero,arthurmde/noosfero,marcosronaldo/noosfero,evandrojr/noosfero,arthurmde/noosfero,vfcosta/noosfero,LuisBelo/tccnoosfero,macartur/noosfero,coletivoEITA/noosfero-ecosol,CIRANDAS/noosfero-ecosol,arthurmde/noosfero,EcoAlternative/noosfero-ecosol,samasti/noosfero,EcoAlternative/noosfero-ecosol,vfcosta/noosfero,samasti/noosfero,coletivoEITA/noosfero-ecosol,larissa/noosfero,AlessandroCaetano/noosfero,vfcosta/noosfero,marcosronaldo/noosfero,blogoosfero/noosfero