layout: add compiled.css

this css file was generated by less(http://lesscss.org/)

    $ lessc bootstrap.less > compiled.css

Since there are too many less files to be downloaded that postpone
opening web page, compiled all of them into one css files.
layout: Use css to instead of less files

this css file was generated by less(http://lesscss.org/)

    $ lessc bootstrap.less > compiled.css

Since there are too many less files to be downloaded that postpone
opening web page, compiled all of them into one css files.

please rever this commit locally when you are developing and
upgrade compiled.css when you modify less files.