Pathing has changed within the kibana project.

pathing to the dashboards has changed.
(cherry picked from commit f8e1f6a)
Use latest kibana for the flatjar. (LOGSTASH-1416)
(cherry picked from commit 79d1863)
Upgrade jruby
(cherry picked from commit af05119)
Update JRuby auto-installer in bin/logstash to use JRuby 1.7.5
(cherry picked from commit 733b2bb)
Updated JRuby URL for downloading 1.7.5
(cherry picked from commit 60064f7)
- remove old junk
(cherry picked from commit a4a0a21)
fixed shutdown issues