create index page
Merge branch 'master' into design
revise `CREATE LINK
fixed some bugs
modified route
changed the path to create page
add a route to new
changed a method to access /editor/create
createに失敗したときindexに飛ぶのを修正
新規作成後再びnewに入ると余計なメッセージが出るバグを修正