Merge pull request #41 from gsolbeck/development

[minor] Update ZenTag query limit to 300
STUPIDROBOT: Add logging of player events for analysis
This commit introduces basic event-logging to allow developers to analyze
gameplay and make changes accordingly. Currently, it is only active for
StupidRobot, where it records keystrokes within the textbox and clicks on
functional buttons. When the player leaves the page, the log is stored as a
JSON text file on the server.
STUPIDROBOT - Add logging for non-player events, other minor changes
This commit refines the event-logging introduced previously. Primarily, it adds
logging for non-player events in StupidRobot, including the image displayed and
the game's reactions to tag submissions. It also makes some other minor
changes:
 - add browser details to event log
 - add actor to event (either player or game)
 - change details of keypress from key code to character
    - add helper function to determine character using KeyboardEvent
 - move logEvent and sendLog functions out of StupidRobot to Game API
    - This will allow the functions to be used by other games in the future

Notes about getPrintableKey helper function: the W3C specifications for the
KeyboardEvent event include a "key" property that contains the key value.
However, as this is not actually supported by many popular browsers, the helper
function uses the keyCode and shiftKey properties to determine the key value.
STUPIDROBOT: Store session logs in individual files on the server
The session logs were previously appended to a single text file. With this
commit, they will be stored in individual files, within the analytics folder.
Merge remote-tracking branch 'upstream/development' into development