Question List Mode implementation

This uses tabulated-list-mode to build the list of questions.
The actual content of questions is displayed on a separate buffer using org-mode (for now of course, this is not permanent).
Sorry for being so cryptic XD I wanted to make a second pass for edits to my questions, but I must have missed this one. In fact, it's even sillier than that -- `forward-line` was 'different from the rest' and didn't use `stack-` functions -- I don't know why I didn't realize that we still need a footing in functionality. Change looks good; my bad.