Add pylint check and fix problems uncoverend by pylint

Signed-off-by: Jakub Filak <jfilak@redhat.com>
Signed-off-by: Michal Toman <mtoman@redhat.com>
Catch more exceptions and handle them correctly

- closes rhbz#926010

Signed-off-by: Jakub Filak <jfilak@redhat.com>
Signed-off-by: Michal Toman <mtoman@redhat.com>
Recover from DBus errors while sending command line

- closes rhbz#926011

Signed-off-by: Jakub Filak <jfilak@redhat.com>
Signed-off-by: Michal Toman <mtoman@redhat.com>
Remove left-over RELEASE varible from configure.ac

Signed-off-by: Jakub Filak <jfilak@redhat.com>
Signed-off-by: Michal Toman <mtoman@redhat.com>
Replace GNU style make pattern rules by implicit rules

Signed-off-by: Jakub Filak <jfilak@redhat.com>
Signed-off-by: Michal Toman <mtoman@redhat.com>