Update dependencies
Merge branch 'master' of github.com:HaxeFoundation/haxe.org
Redirects for any obvious content, to help SEO

See Issue #66.

I have done most of the obvious manual content, as well as various links
from the first several pages of google search results:

https://www.google.com/?gws_rd=ssl#q=site:haxe.org+haxe&safe=active
WWX change post-conference
Code block syntax highlighting

Also fix formatting on language introduction
Merge branch 'master' of github.com:HaxeFoundation/haxe.org