Merge tag '0.9.1'

Tag version 0.9.1

# gpg: Signature made Sun 27 Nov 2016 12:01:10 PM BRST
# gpg:                using RSA key 0x6071E70DCACC60B2
# gpg: a verificar a base de dados de confiança
# gpg: public key of ultimately trusted key 0x030F1C082D2327BE not found
# gpg: 3 marginal(s) needed, 1 complete(s) needed, PGP trust model
# gpg: depth: 0  valid:  11  signed:  71  trust: 0-, 0q, 0n, 0m, 0f, 11u
# gpg: depth: 1  valid:  71  signed:  64  trust: 69-, 0q, 0n, 0m, 2f, 0u
# gpg: depth: 2  valid:  55  signed:  74  trust: 55-, 0q, 0n, 0m, 0f, 0u
# gpg: proxima verificação da base de dados de confiança a 2016-12-12
# gpg: Good signature from "drebs (work key) <db@leap.se>" [ultimate]
# gpg:                 aka "drebs (work key) <drebs@leap.se>" [ultimate]
# Impressão da chave primária: 9F73 295B 6306 E06F 3151  99AE 6071 E70D CACC 60B2