wizard: extended the manual pages

- add a new man page for ignored_words.conf
- add a paragraph about storing answers on the ask dialogues to
  report-gtk.1 man page

Signed-off-by: Jakub Filak <jfilak@redhat.com>
spec: install ignored_words.conf manual page

Signed-off-by: Jakub Filak <jfilak@redhat.com>
bugzilla: try to avoid usage of 'private' group

Related to rhbz#1044653
Closes rhbz#1087370

Signed-off-by: Jakub Filak <jfilak@redhat.com>
Merge pull request #254 from abrt/rhbz1087370_private_group_name

Rhbz1087370 private group name