fix version
move preview and search path into articles resource collection
move stocks path into articles collections
move feed path into articles collections
move user path into articles collections
move article tag path into articles collections
move article update histories path into update histories collections
:put_litter_in_its_place:
fix path
refactor article list pages
Merge pull request #98 from lodge/refactor_routes

config/routes.rb の構造化
add extension white list
fix better_erroes
Merge pull request #102 from lodge/fix_gem_version

fix better_erroes
fix markdown help popup bug
Merge pull request #103 from lodge/fix_help_popup_bug

fix markdown help popup bug
refactor editor view
Merge pull request #104 from lodge/refactor_editor_view

refactor editor view
Merge pull request #101 from lodge/file_upload_bug_fix

add extension white list
Merge pull request #99 from lodge/refactor_article_view

記事一覧のリファクタ