Updates and fixes

I would like to add http/https switching for loading the source file (in the readme) and for sourceing the sprite. I also noticed a two CSS issues with the horizontal nav bar with the light theme I can fix- 
- .unb-bar is not clear fixed thus #unb has 0 height and registers at the bottom of the page in web inspector
- the mail icon has a height of 35px while .unb-bar has a height of 34px (it's more noticable on hover when the blue background shows 1px taller than the UNB)