Added encoding
Added gem specification
Changed site name
Modified footer links
Add jekyll-asset

Add jekyll-asset library to have a better workflow with assets

- Add configuration to _config.yml
- Add correct libraries to Gemfile
- Create blank working asset files
- Modify default layout for inclusion of the default asset file
- Transformed syntax.css to syntax.css.scss to include it in asset pipeline
- Delete files who became useless as a result