adding newer_than older_than named scope methods
adding newer_than older_than named scope methods

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