lib/file: Add comments in FileStat

closes #234
signed-off-by: Johann Dubois <johann.dubois@outlook.com>
Merge branch 'doc_for_FileStat'
lib/html: add method add_outer

closes #233
signed-off-by: Johann Dubois <johann.dubois@outlook.com>
Signed-off-by: Jean Privat <jean@pryen.org>
Merge branch 'html_add_outer'