[kzm_Announcement] Removed excess and unwanted code.
[kzm_announcement] Removed warning of an array.
[template_send_Annnouncement] Added defensive code around $_GET['groupID']
[Single-kzm_group] Getting announcement count to decide whether to show
"View Announcement" link.
If no announcements are available check if user is the creator of group
if yes allow him to send an announcement.
[kzm_announcements] Added a code to insert entry in "broadcastmessage" and "broadcast_message_has_group" table
[functions_group] Added kzmGetAnnouncementCount() method to get announcement count
and isGroupCreator() metod to check if current user is creator of group
[functions_announcements] Added a IsAnnouncementBroadcasted() method to check if announcement exist in broadcastmessage table.
Updated ProcessSendAnnouncement() method to add an entry in "broadcastmessage" and "broadcast_message_has_group" tables.
[archive-kzm_announcement] Added a no announcement notification message if no announcement available for group.
Merge remote-tracking branch 'mongeziupstream/features/groups' into features/announcements

Resolved Conflicts: template_send_announcement.php
Merge branch 'features/announcements' of github.com:Eluminsse17/mxpress into features/groups
[taxonomy-group_category] Added a description text for categories. Improved term/category group count.
[archive-kzm_group] Updated layout. Added new lines and footer text.
[template_single_post] Afixed indexing issue with mxpress_options['useLogoOnSingle'].
[category-group-discussion] Updated title and navigation link text.
[template_group_leave] Updated text.
[template_create_group_topic]  Upadted user text.