Partially resolves Next Game link

Does not support skipping games or configuring sort order.
Improved unit-testability

Made Game.goToNextPendingGame unit-testable (eschewed $.post() and added
Env.window as a mock for window), wrote a test for it, improved the
tests for Game.pageAddGameNavigationFooter, and changed the backend code
to return a proper $data object.
Multiple fixes to how I was performing unit tests

Also slight refactoring to make testing easier.
Fixing jshint and checkstyle issues
$&#*ing trailing whitespace
More trailing whitespace?!?
Switched to apiParsePost(), moved link to Login header

Switched to using an API method that calls apiParsePost(), moved the
"Next game" link to the Login header, added a message if you try to go
to the "Next game" from Overview when there is no next game, and updated
a bunch of relevant tests to match the new implementation.
Trying to make jenkins happy
jenkins
* UI should only pass dieIdx with reactToReserve if action is add
Conforming to coding standards
Updated tests to be consistent with refactored code
Merge pull request #748 from cgolubi1/738_decline_reserve

* UI should only pass dieIdx with reactToReserve if action is add
Merge pull request #736 from AdmiralJota/253_go_to_next_game

Added a link to go to the next game
Implemented "Inactivity" column on Overview page

Modified SQL to retrieve and sort by game's last activity time, added
methods to format it in a friendly way, and updated the javascript to
parse and display it.
Adjusted indentation for jenkins
Foglio, Ogres, Japanese Beetles, finished Sanctum, Samurai, Sailor Moon
Strange - this is showing as FuzzFace here but fuzzface in the folder.
Anyhow, I'm trying to fix the name problem by deleting and resubmitting
resubmitting fuzzface.png
Made the API use epoch seconds for timestamps

Modified SQL queries to use UNIX_TIMESTAMP() to return epoch seconds,
modified API specs to expect numbers for timestamp arguments, added
javascript method for rending timestamps as human-readable date time
strings, and updated dummy reponder to provide integer.