Arndt Kaiser

fix some type-errors caused by the python3 migration

migrate python scripts of core to python3

replace g_type_class_add_private() with the instance private data macros G_DEFINE_TYPE_WITH_PRIVATE or G_ADD_PRIVATE because it's deprecated since GLib 2.58

fix unhandled string-truncations which are detected by new gcc compiler versions

use gobject-introspection bindings to access libgudev, because the old python-library for libgudev is deprecated

synce-pcp and synce-pls now abort at the first error while traversing directories

get rid of compiler warnings by removing unused...

tidy compiler warnings by removing _BSD_SOURCE ...