[aur-general] Merge request python2-sqlalchemy-0.7.9

Please merge/move python2-sqlalchemy-0.7.9 <https://aur.archlinux.org/packages/python2-sqlalchemy-0.7.9/> to (currently empty placeholder) python-sqlalchemy-0.7.9 <https://aur.archlinux.org/packages/python-sqlalchemy-0.7.9/>. python-sqlalchemy-0.7.9 <https://aur.archlinux.org/packages/python-sqlalchemy-0.7.9/> will become a split package containing both python2-sqlalchemy-0.7.9 and python-sqlalchemy-0.7.9.