Sass, CSS/HTML updates & new classes

removed font-weight:400 on hover as it had a weird delay in some browsers that made it a choppy animation.

Created Sass Version of CSS

reduced file size of CSS by about 20 bytes

add new classes for slide nav so that the code can be more easily dropped into an existing project w/out having to worry about style conflicts.
max widths for nav states

create a max width for normal / hover states