rename from capistrano_fluentd to capistrano_ninja
rename from capistrano_fluentd to capistrano_ninja
rename StaticTagLogger to FluentLogger
fix "stack level too deep"
add fluentd.conf example to test
modify tag_base from "cap" to "ninja" for another program like chef.
fix the way to get local hostname
modify log level type from integer to string
modify key order of map
rename id to exec_id