Added option: show custom forms in statistics table

git-svn-id: https://plugins.svn.wordpress.org/wp-pro-quiz/trunk@1005060 b8457f37-d9ea-0310-8a92-e5e31aec5664
Added "solved" display in statistic-overview

git-svn-id: https://plugins.svn.wordpress.org/wp-pro-quiz/trunk@1005062 b8457f37-d9ea-0310-8a92-e5e31aec5664
Added hooks for plugins

git-svn-id: https://plugins.svn.wordpress.org/wp-pro-quiz/trunk@1005063 b8457f37-d9ea-0310-8a92-e5e31aec5664
Translation for hungarian have been added (Thanks Webstar Csoport Kft.)

git-svn-id: https://plugins.svn.wordpress.org/wp-pro-quiz/trunk@1005066 b8457f37-d9ea-0310-8a92-e5e31aec5664
Bugfix in DemoBox

git-svn-id: https://plugins.svn.wordpress.org/wp-pro-quiz/trunk@1005067 b8457f37-d9ea-0310-8a92-e5e31aec5664
Bugfix

git-svn-id: https://plugins.svn.wordpress.org/wp-pro-quiz/trunk@1005069 b8457f37-d9ea-0310-8a92-e5e31aec5664