Make textareas which come in via post loading AJAX also expandable.

This also fixes the issue of comment form inconsistency.
Bump jquery.expandable.js from version 1.0 to version 1.1.4 .

One of the desired updates here is that it doesn't allow reinitialization of a
textarea if it has already been initialized.
Merge pull request #35 from Libertree/consistent-comment-forms

Make textareas which come in via post loading AJAX also expandable.