Bug#1051125: RFS: a2d/2.0.0-1 [ITP] -- APRS to DAPNET portal

[Yogu NY3W]

I've removed the redundant dh_auto_clean in d/rules, created
debian/a2d.install to list the extra files, and made necessary adjustments
in setup.py to manage these files. Would you kindly review and confirm if
the package now aligns with Debian's requirements?