[WIP] invited user now has comma separated permission values

stored against it so that user can be created with correct
permissions.

migrations/versions/0029_add_permissions_to_invite.py

@@ -0,0 +1,26 @@
+"""empty message
+
+Revision ID: 0029_add_permissions_to_invite
+Revises: 0028_add_default_permissions
+Create Date: 2016-02-26 16:17:30.612924
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '0029_add_permissions_to_invite'
+down_revision = '0028_add_default_permissions'
+
+from alembic import op
+import sqlalchemy as sa
+
+
+def upgrade():
+    ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('invited_users', sa.Column('permissions', sa.String(), nullable=False))
+    ### end Alembic commands ###
+
+
+def downgrade():
+    ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column('invited_users', 'permissions')
+    ### end Alembic commands ###