Added xface application doc, both eng and chn versions
Linked to xface application doc
Removed strong, em from default style to get they both get displayed as expected
Removed all list related style, since it didn't correctly apply to nested list with 2 levels and above, and it also ran into problem that inconsistency between ff and chrome, refer to http://stackoverflow.com/questions/1142314/css-rendering-inconsistency-on-ul-with-firefox-being-the-odd-ball-out
Used kramdown instead of maruku, maruku didn't play quite well with list