separate server code and add fileserver
add some filepath util

addExt, toStringArray, isIn
update wikilink to handle dir and main page
update page

remove NewPage
add security check
handle directory
if file not found, search appropriate file
add filelist in main page of a dir
add sidebar
fix wikilink

absolute path
fix filelist in wikiRoot

when hidden dir (ex. .git) is in PageList, renderer crashed.