Add a migration to move the existing webhooks over and another migration to remove the legacy webhooks table.

data/migrations/versions/2d9b90e50775_remove_the_legacy_webhooks_table.py

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+"""Remove the legacy webhooks table
+
+Revision ID: 2d9b90e50775
+Revises: 47670cbeced
+Create Date: 2014-07-31 13:56:10.702609
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '2d9b90e50775'
+down_revision = '47670cbeced'
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import mysql
+
+def upgrade():
+    ### commands auto generated by Alembic - please adjust! ###
+    op.drop_table('webhook')
+    ### end Alembic commands ###
+
+
+def downgrade():
+    ### commands auto generated by Alembic - please adjust! ###
+    op.create_table('webhook',
+    sa.Column('id', mysql.INTEGER(display_width=11), nullable=False),
+    sa.Column('public_id', mysql.VARCHAR(length=255), nullable=False),
+    sa.Column('repository_id', mysql.INTEGER(display_width=11), autoincrement=False, nullable=False),
+    sa.Column('parameters', mysql.LONGTEXT(), nullable=False),
+    sa.ForeignKeyConstraint(['repository_id'], [u'repository.id'], name=u'fk_webhook_repository_repository_id'),
+    sa.PrimaryKeyConstraint('id'),
+    mysql_default_charset=u'latin1',
+    mysql_engine=u'InnoDB'
+    )
+    ### end Alembic commands ###

data/migrations/versions/47670cbeced_migrate_existing_webhooks_to_.py

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+"""Migrate existing webhooks to notifications.
+
+Revision ID: 47670cbeced
+Revises: 325a4d7c79d9
+Create Date: 2014-07-31 13:49:38.332807
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '47670cbeced'
+down_revision = '325a4d7c79d9'
+
+from alembic import op
+import sqlalchemy as sa
+
+
+def upgrade():
+    pass
+
+
+def downgrade():
+    pass