add favicon
add /note --> download markdown file
Refactoring about DB
Improve DB module
update .gitignore
Fix show raw in histroy mode

- show right version of markdown contents of individual post
Enable Multifile merge

- if data file's filename differs from zipfile's W treat it properly
- if subdirectory exists in zipfile, W read it properly
- if multiple files exist in zipfile, W will merge all files at once
-none
fix bug : ask to restore twice