Remove workaround-548392 and pycentral-backwards-compatibility options

closes: #597137
pass buildsystem to the sequencer rather than to DH_OPTIONS

closes: #597128
do not reset environment options in debian/rules
replace tabs with spaces
use dh_python2 instead of dh_pysupport
adjust debian/control template to latest changes in policy
replace underscore with a dash in package names
Merge pull request #51 from esc/apply_debian_patches

Apply Debian patches
Merge pull request #44 from fidlej/master

Fixed passing of config options
remove options that are no longer supported from docs

The options --pycentral-backwards-compatibility and --workaround-548392 were
removed with commit 7f2a1d7. Update the docs to reflect this change.
Check if unzip commands exists and exit with an error message displayed if not
Merge pull request #60 from rodo/master

Check missing unzip binary