Add the account ID to the ofxaccount table

This is how we'll store the account ID we need to send to the
institution to identify the account we want to pull records from

alembic/versions/4b8ce290f890_ofxaccount_account_id.py

@@ -0,0 +1,28 @@
+"""ofxaccount account_id
+
+Revision ID: 4b8ce290f890
+Revises: 2d295ac0fc07
+Create Date: 2016-06-23 08:32:42.429402
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '4b8ce290f890'
+down_revision = '2d295ac0fc07'
+branch_labels = None
+depends_on = None
+
+from alembic import op
+import sqlalchemy as sa
+
+
+def upgrade():
+    ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('ofxaccount', sa.Column('account_id', sa.String(length=255), nullable=False))
+    ### end Alembic commands ###
+
+
+def downgrade():
+    ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column('ofxaccount', 'account_id')
+    ### end Alembic commands ###