Adiciona o .txt da tabela 3.10 do Morettin

data-raw/MorettinTb3.10.txt

+Ano	Jan	Fev	Mar	Abr	Mai	Jun	Jul	Ago	Set	Out	Nov	Dez
+1952	20.8	20.1	20.5	17.1	16.7	15.2	14.8	16.8	15.9	18	19.1	19.8
+1953	21.9	20.7	20.9	18.1	16.9	15.5	13.3	15.8	17.8	18.4	18.6	19.4
+1954	22.1	21.5	21	18.3	16.5	16.3	15.7	16.2	17.7	17.7	18.5	19.6
+1955	21.1	21.9	20.7	18.6	15.7	14.9	14.7	15.5	16.6	16.4	16.9	20.2
+1956	23.4	21.2	20.3	18.1	15.1	13.5	14	13.6	17.6	17	16.7	19.1