Add status for Corpus model

app/models.py

@@ -436,6 +436,7 @@ class Corpus(db.Model):
     description = db.Column(db.String(255))
     title = db.Column(db.String(32))
     user_id = db.Column(db.Integer, db.ForeignKey('users.id'))
+    status = db.Column(db.String(16))
     # Relationships
     files = db.relationship('CorpusFile',
                             backref='corpus',