Upgrade to latest available version of A-MQ and change deprecated Karaf command

Upgraded to indicate the latest version of GA A-MQ available from the developer portal.
The newer version of Karaf no longer seems to respect the “Webapp-Context” parameter, and require the newer “Web-ContextPath”. Some background information is available here (non-authoritative source):
http://irclogs.dankulp.com/logs/irclogger_log/karaf?date=2013-12-08,Sun&text=on