Instead of showing comments chronologically, group them into posts, then sort
the posts by last comment date. Reason: improved comment context delivery
makes discussion bumping possible (no matter how old it is) and discussion is
what comments are about.
Comment count is limited to 5 per post.
Following privileges for post actions can now understand different settings for
everyone and for uploader:
* Scoring posts
* Featuring posts
* Flagging posts
* Favoriting posts
Additionally, privilege for flagging users can now understand different
settings for everyone and for the user that is currently logged in.
In other words: with this update admin can configure privileges so that scoring
own posts or flagging oneself will be prohibited, while scoring other people's
posts or flagging others will be okay.
"help" text was used twice in two navigation menus: once in top navigation and
once in tab bar (along with "prrivacy policy" and "rules"). The "help" in tab
bar was changed to "general help" to avoid potential confusion.
- Most of model-related code moved from controllers to model classes, much
fewer calls to R::whatever() in controllers
- Post editing and uploading shares the same code, thus making implementing
stuff easier in the future
- Added support for default bean wiring, no more calls to R::preload() all over
the place
- More robust concurrent post editing detection
