Attempt - universal box.

Discussed briefly in Issue #6.
I don't think it's a good idea.
Remove universal container codes.

As mentioned in last commit, it is not a good idea.
Continuing on photo layer support.

This partially fixes Issue #6.
Add support for replying to others' comments.
Change the Q&A info to let user make some text input at first, to ensure the text input box holds while adding emoticons.