Update sqlalchemy from 1.2.6 to 1.2.7

requirements.txt

@@ -9,7 +9,7 @@ pyasn1==0.4.2
 tvdb_api==1.10
 repoze.lru==0.7
 pygeoip==0.3.2
-sqlalchemy==1.2.6
+sqlalchemy==1.2.7
 dataset==1.0.8
 python-instagram==1.3.2
 simplejson >= 3.0.0