Init data

locales/ とか data/ とか
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Merge pull request #16 from blanketsheep/dev/prose

Create _prose.yml
Merge pull request #18 from blanketsheep/dev/prose

Create .gitkeep
Merge remote-tracking branch 'origin/develop' into design/0509
Merge pull request #20 from blanketsheep/design/0509

デザインを仮反映
Merge pull request #21 from blanketsheep/dev/prose

Update _prose.yml