The packageFiles system makes it easier to export site config data
from PHP to JS, which we need a lot of, but it's awkward when mixing
it with defining and accessing classes via a namespace like mw.dt.
The only thing remaining in mw.dt is mw.dt.pageThreads, which is
described to be "for debugging", so we should keep it easy to type.
Also we still use the namespace for documenting classes.
Everything else can be reached by require()'ing a ResourceLoader
module, for example instead of `mw.dt.ui.ReplyWidget`
you'd do `require( 'ext.discussionTools.ReplyWidget' )`.
(When debugging from browser console, use `mw.loader.require` instead.)
Change-Id: I6496abcf58c21658d6fd0f3fc1db1f7380a89df7
Possible use cases:
* Matching comments between PHP and Parsoid HTML [implemented here]
* Finding the same comment in a different revision of a page
(e.g. while resolving an edit conflict, or to allow resuming
composition of autosaved comments) [implemented for highlighting
user's own posted comment only]
* Permanent links to comments [future]
The reasoning for this form of ID is:
* _Timestamp_ by itself is a nearly unique identifier, so it's a good
thing to start with
* Users may post multiple comments in one edit (or in many edits in
one minute), so we need the _sequential number_ to distinguish them
* _Username_ is probably not required, but it may reduce the need
for sequential numbers, and will help with human-readability if we
add permanent links
The ID remains stable when a new comment is added anywhere by anyone
(excepts comments within the same minute by the same user), or when a
section is renamed.
It's not always stable when a comment is moved or when an entire
section is moved or deleted (archived), but you can't have everything.
Change-Id: Idaae6427d659d12b82e37f1791bd03833632c7c0
