Version 3.1.8

# Improvement: Added option to make the sticky header of same width as box width.
# Improvement: Social icons in top header now supports 4 custom icons and a full list of FontAwesome icons.
# Improvement: FontAwesome updated to latest version 4.6.3.
# Fix: Instagram option in social media options not working.
# Fix: code before </head> tag was being added after opening of body tag.