it just works
update readme
basic framework
fix less error
fix less reference
update home.html, course.html and index.html
fix master.less typo
add vendor.css (alos covert file format from dos to unix)

correct urls in navigator
css should be complete (at least for home page & course page)
style regulation: contact page
enable sprite
refactor controller
seperate navigation and header
Height of jumbotrons are different in different page.