Add research mode to service/history tables

- added as a nullable boolean column.

migrations/versions/0023_add_research_mode.py

@@ -0,0 +1,28 @@
+"""empty message
+
+Revision ID: 0023_add_research_mode
+Revises: 0022_add_pending_status
+Create Date: 2016-05-31 11:11:45.979594
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '0023_add_research_mode'
+down_revision = '0022_add_pending_status'
+
+from alembic import op
+import sqlalchemy as sa
+
+
+def upgrade():
+    ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('services', sa.Column('research_mode', sa.Boolean(), nullable=True))
+    op.add_column('services_history', sa.Column('research_mode', sa.Boolean(), nullable=True))
+    ### end Alembic commands ###
+
+
+def downgrade():
+    ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column('services_history', 'research_mode')
+    op.drop_column('services', 'research_mode')
+    ### end Alembic commands ###