First pages commit
Merge branch 'master' into gh-pages

Conflicts:
	index.html
update for index.html
Merge branch 'master' into gh-pages
Merge branch 'master' into gh-pages
Merge branch 'master' into gh-pages
Merge branch 'master' into gh-pages
Merge branch 'gh-pages' of https://github.com/gaoli/snake into gh-pages
Merge branch 'master' into gh-pages
添加屏幕自适应