fix blog index and links

app/views/blog/index.haml

@@ -1,9 +1,9 @@
 .blog.blog_index
-  - @pages.each do |slug , page|
+  - @posts.each do |slug , post|
     .row
       .col-md-2
       .col-md-8
-        %h2= link_to page.title , blog_page_url(page.slug)
-        = render( page.template_name )[0 ... 350].html_safe
-        %span.whole= link_to ". . . .Read whole post" , blog_page_url(page.slug)
+        %h2= link_to post.title , blog_post_url(post.slug)
+        = render( "posts/#{post.template_name}" )[0 ... 350].html_safe
+        %span.whole= link_to ". . . .Read whole post" , blog_post_url(post.slug)
       .col-md-2