remove duplicate content
fix typo
Merge pull request #144 from yamkazu/fixtypo

fix typo
Merge pull request #143 from yamkazu/duplicate

remove duplicate content
fix typo
Merge pull request #145 from yamkazu/typo

fix typo
remove unnecessary symbol
Merge pull request #146 from yamkazu/removesymbol

remove unnecessary symbol
Update submodule reference
Merge branch 'master' into ganta