Fixed non-static references to static properties
Fixed non-static references to static properties
Fixed issue #289, likert and likertmatrix questions weren't being rendered properly
Fixed issue #289, likert and likertmatrix questions weren't being rendered properly
Fixed issue #286, token replacement didn't distinguish between quiz results url and survey results url
Tokens replacement for polls results
Create state table during the installation
Fixed #261, added elapsed time parameter to the save form
Fixed matrix questions display percentages
Partially fixed #299
Fixed question type filtering
Fixed question type filtering
Solved mark and automark issues
Implemented issue #225
Implemented #216
Changed images and remove bad references to satisfy wordpress requirements
Upgrading version
Update version changelog
Implemented issue #308
Implemented issue #308, added export poll to csv feature