Update for cscope and ctags
Nothing but coding style
Add TODO list
Add help.txt
Update to use lua closure
Optimus codes
Update .gitignore
Nothing important but optimuz some codes.
Update load_thumbnails
Update for -DDEBUG
Move the target to bin/
Bugfix.
Update lua to v5.2.3 and libjpeg to v9a
Update for a better README with markdown
Update luaL_openlib() to lua-5.2 style (replaced with luaL_newlib() or luaL_setfuncs())
Update .gitignore
Update Versions.md
Make clean
Update .gitignore
Localize some function.