Add SCSS via Asset Pipeline (#65)

* Remove old files

* Add SCSS pipeline

* Add generated files

* Fix navigation HTML

* Fix media queries

* Remove RTL

* Fix styling for big screens

* Remove separator configs

* Fix menu dropdown

* Add working mobile menu

* Fix menu item heights

* Update README

assets/scss/_navigation.scss

@@ -0,0 +1,88 @@
+.navigation {
+  height: 6.0rem;
+  width: 100%;
+  a, span {
+    display: inline;
+    font-size: 1.6rem;
+    text-transform: uppercase;
+    line-height: 6.0rem;
+    letter-spacing: 0.1rem;
+    @media only screen and (max-device-width : 768px) {
+      font-size: 1.4rem;
+    }
+  }
+}
+
+.navigation-list {
+  float: right;
+  list-style: none;
+  margin-bottom: 0;
+  margin-top: 0;
+  @media only screen and (max-device-width : 768px) {
+    position: absolute;
+    top: 6.0rem;
+    right: 0;
+    z-index: 5;
+    visibility: hidden;
+    opacity: 0;
+    padding: 0;
+    max-height: 0;
+    width: 100%;
+    background-color: $bg-color;
+    border-top: solid 2px $alt-bg-color;
+    border-bottom: solid 2px $alt-bg-color;
+    transition: opacity 0.25s, max-height 0.15s linear;
+  }
+}
+
+.navigation-item {
+  float: left;
+  margin: 0;
+  position: relative;
+  @media only screen and (max-device-width : 768px) {
+    float: none !important;
+    text-align: center;
+    a, span {
+      line-height: 5.0rem;
+    }
+  }
+  a, span {
+    margin-left: 1.0rem;
+    margin-right: 1.0rem;
+  }
+}
+
+.menu-button {
+  display: none;
+  @media only screen and (max-device-width : 768px) {
+    display: block;
+    font-size: 2.4rem;
+    line-height: 6.0rem;
+    color: $fg-color;
+    cursor: pointer;
+  }
+}
+
+.menu-separator {
+  @media only screen and (max-device-width : 768px) {
+    border-top: 2px solid $fg-color;
+    margin: 0 8.0rem;
+    span {
+      display: none;
+    }
+  }
+}
+
+#menu-toggle {
+  display: none;
+  @media only screen and (max-device-width : 768px) {
+    &:checked + label {
+      color: $alt-bg-color;
+    }
+    &:checked + label + ul {
+      visibility: visible;
+      opacity: 1;
+      max-height: 100rem;
+    }
+  }
+}