Merge branch 'release/0.4.0' into develop
Merge branch 'master' into develop
Make mpidl domain and load it
Rewrite API reference with mpidl domain
Fix style for mpidl domain
eliminate unnecessary checkout commands for jubatus-mpio & jubatus-msgpack-rpc in build.html
add configuration example path in tutorial
fix packages required to setup build environment in RHEL
NAME_server.hpp is generated by mpidl, not jenerator
fix mistranslation of jubaconfig usage
Write articles about data structures
Merge pull request #28 from hido/fix_build_html

Eliminated unnecessary checkout commands in build.html
add required Ruby version
add requried version of Python for mpidlconv
fix path to plugins (fix #30)
fix to match line number with Japanese version (to avoid forgetting translation)
fix path to libdir
update how to contribute
add load json.config in Tutorial

we should load special json.config for running tutorial correctly.
make publish.sh failsafe when invoked using sh