[v25] Templating, theme improvements and other fixes
*	Fixed iOS rotation / zooming with the help of TCB
*	Fixed appends double-encoding HTML, with thanks to Stephen Taylor
*	Fixed unable to delete corrupted posts unless signed in
	NOTE: the class `nnf_error` was added to `<article class="nnf_post nnf_op">` in "delete.html"
*	Updated to DOMTemplate v16, much better handling of HTML / XML