fix the template for <meta name="keywords">

Array page.tags should be join with ", ".
Merge pull request #3 from BillLeecn/fix-meta-keywords

fix the template for <meta name="keywords">
Remove dependencies on Google fonts
Add a layout for pages
Customize for my blog
Claim copyright for articles in _posts/
add license for posts
Add CNAME file
first post
fix div.post-license structure
configure google analytics
new post
enable font awesome