v0.5.0

Fixed

• Error: Import directives may not be used within control directives or mixins. in certain cases like when compiling with Ruby Sass.
  Solution: @import all available types and instead nest Sass for each type in @if directive which checks to see if the type exists in $hamburger-types. e.g.:

@if index($hamburger-types, 3dx) {
   .hamburger--3dx {
   }
}