Merge pull request #1214 from mahagr/master

Update version requirements and fix installation issues in Joomla! 3.0 (API changes)
Prevent issue when show voters is on no
Merge pull request #1227 from xillibit/bugs9

Prevent issue when show voters is on no
#1234 Undefined method JDate::toMysql() announcement.php on line 101
#1234 Undefined method JDate::toMysql() announcement.php on line 101 
Merge pull request #1236 from xillibit/bugs12

#1234 Undefined method JDate::toMysql() announcement.php on line 101 
#1235 Warning: call_user_func_array() expects parameter 1 to be a valid 
Merge pull request #1242 from xillibit/bugs15

#1235 Warning: call_user_func_array() expects parameter 1 to be a valid 
#1240 BBcode editor is missing on new topic
Merge pull request #1273 from mahagr/master

Fix KunenaDate to work with Joomla! 3.0, update version checks in plugins
Merge remote-tracking branch 'upstream/master' into bugs_mt_30
#1240 BBcode editor is missing on new topic 
Merge pull request #1283 from xillibit/bugs_mt_30

#1240 BBcode editor is missing on new topic 
Documentation: Add MySQL Workbench file for Kunena database schema
Merge pull request #1287 from mahagr/master

Add database schema files for unit testing, installation, upgrades and documentation
Merge remote branch 'upstream/master' into 30_installer