initial commit of MT Style Guide

A parts of guide written in Japanese will be translated to English later
removed styleguide script
Merge branch 'develop' into feature-style-guide
added style guide
added styleguide
added Style Guide
Added style guide
added Style Guide at listing.css
refined design guinde in structure.css
Merge branch 'develop' into feature-style-guide
added style guide to sortable.css
added style guide
Merge branch 'feature-style-guide' into develop