pull changes from dev to production on 2014-05-27

This update brings these pulls, already on dev, to production:
* #836, #871: color on overview page
* #838, #839: mood swing dice only use standard die sizes, and add mad swing skill (doesn't appear in any available buttons yet)
* #843: fix a bug in editing of chat containing html-like tags
* #842: visually display captured dice
* #851: add per-browser "compact" and "no images" settings
* #849, #873: visually distinguish the dev and prod sites
* #852: hide game creation form after game creation
* #853: do more validation of new usernames, and hide account creation form after account creation
* #869, #886, #887: highlight recent action log and chat messages
* #878: fix a couple of brittle QUnit tests
* #864: load all javascript files dynamically

Database updates:
```
00509_mad_swing_01.sql
00722_player_activity_01.sql
```