Now a gadget generates up to three modules:
* The first is known as meta module which still use its original name to keep B/C. It contains no contents, with dependencies of ones specified by user, scripts module, and styles module. See below.
* The second is known as scripts module whose name ends with ".scripts". It contains all scripts in this gadgets, with dependencies specified by user
* The third is known as styles module whose name ends with ".styles". It contains all styles in this gadgets and loaded before documents. After its load it's instantly marked as ready without dependencies resolved (which is the same as dependencies of .scripts but may not be used at all)
The meta module is loaded as if there's only one module under that name, and it's safe for users to reuse that name. The styles module is loaded and marked as ready in <head>, as described above. Normally the scripts and styles modules shouldn't be used by users.
A possible bug that dependency-only gadgets (ie. no scripts or styles) may not be loaded is fixed.
* Uses the new hook in User:getDefaultOptions (bug 30940; r97365)
* This revision is based on a similar one for RL2 in the branch (r97366). Needs to be back ported as the bug occurs in 1.18 as well
TODO:
* Are there instances where we might want to restrict CSS as well as JS?
* Would a $wg config option and/or user preference and/or index.php GET parameter to limit inclusion be useful?
* Can we deprecate any of the existing $wg config options?
* What's going on with the duplicated code between OutputPage and SkinTemplate?
