[aur-general] merge request, some python packages to python2

Can you please merge: * python-flask-principal [1] ==> python2-flask-principal [2] * python-flask-sqlalchemy [3] ==> python2-flask-sqlalchemy [4] * python-speaklater [5] ==> python2-speaklater [6] Thanks! Ward [1] https://aur.archlinux.org/packages/python-flask-principal/ [2] https://aur.archlinux.org/packages/python2-flask-principal/ [3] https://aur.archlinux.org/packages/python-flask-sqlalchemy/ [4] https://aur.archlinux.org/packages/python-flask-sqlalchemy/ [5] https://aur.archlinux.org/packages/python2-speaklater/ [6] https://aur.archlinux.org/packages/python-speaklater/