Add URL for OFX source

We need this to know where we are communicating with the API

alembic/versions/a5eaf1296414_ofxsource_url.py

@@ -0,0 +1,24 @@
+"""ofxsource_url
+
+Revision ID: a5eaf1296414
+Revises: eac3a08698a7
+Create Date: 2016-07-20 15:23:45.880556
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = 'a5eaf1296414'
+down_revision = 'eac3a08698a7'
+branch_labels = None
+depends_on = None
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+def upgrade():
+    op.add_column('ofxsource', sa.Column('url', sa.String(length=4096), nullable=False))
+
+
+def downgrade():
+    op.drop_column('ofxsource', 'url')