Updated CHANGELOG.
Bugix in method get_title. Return item no for related objects.
Merge pull request #1350 from normanjaeckel/UpdateChangelog

Updated CHANGELOG.
Merge pull request #1351 from frauenknecht/i1327_2

Fix #1327 - Related agenda item has no (auto) agenda number
Updated English language files.
Returns a 404 response if a requested poll does not exist.

fixes #1355
Merge pull request #1358 from normanjaeckel/LanguageFile

Updated English language files.
Merge pull request #1356 from ostcar/poll404

Returns a 404 response if a requested poll does not exist.