mod _config.yml for Jekyll update and correct build warnings

Author: cometsong

_config.yml

@@ -1,23 +1,16 @@
 # Welcome to Jekyll!
-#
-# This config file is meant for settings that affect your whole blog, values
-# which you are expected to set up once and rarely need to edit after that.
-# For technical reasons, this file is *NOT* reloaded automatically when you use
-# 'jekyll serve'. If you change this file, please restart the server process.
 
 # Site settings
 title: Vim-CtrlSpace
 email: wojtek.ryrych@gmail.com
-description: > # this means to ignore newlines until "baseurl:"
-  Write an awesome description for your new site here. You can edit this
-  line in _config.yml. It will appear in your document head meta (for
-  Google search results) and in your feed.xml site description.
+description: >
+  Vim CtrlSpace is *your* Vim Space Controller!
 baseurl: ""
-url: "http://yourdomain.com" # the base hostname & protocol for your site
+url: "https://vim-ctrlspace.github.io/"
 twitter_username: "VimCtrlSpace"
 github_username:  "vim-ctrlspace/vim-ctrlspace"
 excerpt_separator: "<!-- more -->"
 
 # Build settings
 markdown: redcarpet
-highlighter: pygments
+highlighter: rouge