This updates all Python packages that download their source from PyPi to
use pypi.mk.

This will allow future improvements/changes to pypi.mk to affect all
relevant packages.

This also makes it easier for future Python packages to start using
pypi.mk, when it's clear how it is used in existing packages.

Signed-off-by: Jeffery To <jeffery.to@gmail.com>

Signed-off-by: Fabian Lipken <dynasticorpheus@gmail.com>

Signed-off-by: Alexandru Ardelean <ardeleanalex@gmail.com>

seafile-seahub was the only user of this.
Remove this from the build.
Having it here is a bit messy.

Signed-off-by: Alexandru Ardelean <ardeleanalex@gmail.com>

Add LICENSE file
Changed URL of the project
Reordered stuff in Makefile

Signed-off-by: Josef Schlehofer <pepe.schlehofer@gmail.com>

Signed-off-by: Karel Kočí <cynerd@email.cz>