Renamed the header of the CSV to 'to' from 'number' to allow for email jobs

- added new columns to Job and Notification to capture the start/end dates accurately

migrations/versions/0022_add_processing_dates.py

@@ -0,0 +1,26 @@
+"""empty message
+
+Revision ID: 0022_add_processing_dates
+Revises: 0021_add_job_metadata
+Create Date: 2016-02-24 17:15:47.457200
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '0022_add_processing_dates'
+down_revision = '0021_add_job_metadata'
+
+from alembic import op
+import sqlalchemy as sa
+
+
+def upgrade():
+    op.add_column('jobs', sa.Column('processing_finished', sa.DateTime(), nullable=True))
+    op.add_column('jobs', sa.Column('processing_started', sa.DateTime(), nullable=True))
+    op.add_column('notifications', sa.Column('sent_at', sa.DateTime(), nullable=True))
+
+
+def downgrade():
+    op.drop_column('notifications', 'sent_at')
+    op.drop_column('jobs', 'processing_started')
+    op.drop_column('jobs', 'processing_finished')