Added storage for false answer explanation on answers

Signed-off-by: René Meye <rene@meye.md>
Nicer user interface

Signed-off-by: René Meye <rene@meye.md>
New Shortcut for inserting Questions

Signed-off-by: René Meye <rene@meye.md>
Readable Question Types

Signed-off-by: René Meye <rene@meye.md>
Markdown support for questions

Signed-off-by: René Meye <rene@meye.md>
Mathjax in Admin Interface

Signed-off-by: René Meye <rene@meye.md>