add static 960 grid system
add collapse-menu module
reverse doctype to xhtml1.0
add offset to static 960 grid system
add overflow hidden style to tab-btn
delete inline style
add major contributors to readme file
resolve variables.less conflic
add fluid grid system
Merge pull request #2 from alfredzh/master

add collapse-menu module
Merge branch 'master' of https://github.com/guoyao/graceful-web-ui
add demo for grid system
update readme
Merge branch 'dev'