Change sort order for templates from name to date using full timestamp

so that it would be most recently used at top.

migrations/versions/0045_template_stats_update_timestamp.py

@@ -0,0 +1,32 @@
+"""empty message
+
+Revision ID: 0045_template_stats_update_time
+Revises: 0044_add_template_stats
+Create Date: 2016-04-05 14:32:45.165755
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '0045_template_stats_update_time'
+down_revision = '0044_add_template_stats'
+
+import datetime
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.sql import table, column
+
+
+def upgrade():
+    ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('template_statistics', sa.Column('updated_at', sa.DateTime(), nullable=True))
+    updated_at = table('template_statistics', column('updated_at'))
+    op.execute(updated_at.update().values(updated_at=datetime.datetime.utcnow()))
+    op.alter_column('template_statistics', 'updated_at', nullable=False)
+    ### end Alembic commands ###
+
+
+def downgrade():
+    ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column('template_statistics', 'updated_at')
+    ### end Alembic commands ###