refactor(config): group configs together

fixes #21

_config.yml

@@ -1,4 +1,4 @@
-# Site settings
+# site
 title: Sarbbottam’s weblog
 description: Sarbbottam’s weblog on web accessibility, html, css, javascript, front-end techniques and front-end eco system.
 email: sarbbottam@gmail.com
@@ -10,24 +10,23 @@ twitter:
   username: sarbbottam
 author: sarbbottam
 
+# collection
 collections:
   posts:
     output: true
     permalink: /blog/:year/:month/:day/:title
   projects:
 
-gems:
-  - jekyll-redirect-from
-  - jekyll-seo-tag
-  - octopress-paginate
+# pagination
+paginate_path:
+  blog: /blog/page/:num/
+  project: /project/page/:num/
 
-# Build settings
+# build
 markdown: kramdown
-
 sass:
   style: compressed
-
-# Blog Settings
-paginate_path:
-  blog: /blog/page/:num/
-  project: /project/page/:num/
+gems:
+  - jekyll-redirect-from
+  - jekyll-seo-tag
+  - octopress-paginate