Update json gem 1.8.1

1.4.6 doesn't compile with Ruby >= 2.0.0
Fix XLog.parse_header for Ruby >= 2.0.0
Update to ruby-1.9.3-p545.
The Secret History of Junethack
Don't enable tracing by default
Update date and tournament dates for 2014
Merge branch 'master' of github.com:junethack/Junethack