Fix encoding for columns serialized with YAML
Fix encoding for columns serialized with YAML

See a good explanation about the problem in '4. YAML serialized columns':
http://blog.rayapps.com/2013/03/11/7-things-that-can-go-wrong-with-ruby-19-string-encodings/

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