Cleaned up .gitignore a little bit

.gitignore

 changes
 Gemfile.lock
-_includes/css/grunt.css
-_includes/scripts/grunt.js
 _site
-node_modules
-_cache
-_gist_cache
 .sass-cache
 _site/
-node_modules/
-_cache/
-_gist_cache/
 .sass-cache/
 # Windows image file caches