HTML5 Boilerplate files.
Added .idea (phpstorm project file), .sass-cache, and OS X .DS_STORE to .gitignore
Renamed css/main.css to sass/main.scss and sass now controls output of css/main.css after running sass --watch css:sass
Created variables for colors.
Refactored nav styles to use sass nesting.
Refactored width to use sass math as indicated by comment.
Refactored -orange value to use darken() function.
Refactored box-shadow declarations into a mixin.
Pulled out variables and mixins into separate files for import.