Favicon PSD updated

• Removed unnecessary images from slice tool for 'save as for web'
• Removed other elements
• Rearranged stuffs
Major updates and fixes

• Updated favicon file path
• Updated favicon to retina instead
• scripts.php added
• jQuery updated, jQuery 2.x has the same API as jQuery 1.x, but does not support Internet Explorer 6, 7, or 8.
• Totally forgot to add `_normalize.scss` to `base.scss` file
• Better Helvetica font added
• Placehold.it added for demo
• Minor CSS fixes