Forcing daemon startup to use ruby1.9.1 instead of whatever /usr/bin/ruby
is pointing at.
Adjusting command to ensure the proper version of ruby is used to execute
Kibana in the init script.  gems are installed for ruby1.9.1, so the daemon
startup command will force using ruby1.9.1 too now, but 1.9.1 is an attribute
so that it can be changed in one place as necessary.
Adjusting README to contain the comment for the new attribute I added.
Merge branch 'master' of github.com:realityforge/chef-kibana