Fix links and filenames on README
Fix links and filenames on README

The tutorial on how to create a blog post had broken links
StackExchange/blog,StackExchange/blog,StackExchange/stack-blog,jericson/stack-blog,StackExchange/blog,jericson/stack-blog,StackExchange/stack-blog,dgrtwo/stack-blog,jericson/stack-blog,StackExchange/stack-blog,dgrtwo/stack-blog,dgrtwo/stack-blog,StackExchange/blog,jericson/stack-blog,StackExchange/stack-blog,StackExchange/blog,dgrtwo/stack-blog,StackExchange/stack-blog,jericson/stack-blog,dgrtwo/stack-blog