Initial commit
Scan directory work with delete books also
Thumbnail system are employed
Master branch with unfixed thumbnail system
switch back end to redis

modified:   .gitignore
deleted:    Model/Book.hs
deleted:    Model/Type.hs
modified:   public/js/xtag.js
renamed:    main.hs -> src/Main.hs
new file:   src/Model/Book.hs
new file:   src/convert
System is now able to display files under Non-ASCII folders as well
System now will treat empty book directory gracefully
Add book preview feature; Add keyboard navigation for bookIndex,
bookpreview and page;
Improved scan book algrithm: scan only happens when book was not found
in database
Add cabal build script and license
Merge branch 'master' of https://github.com/yeyan/xtag into dev

Conflicts:
	LICENSE