Move src assets files out of dist folder, clean up grunt and related files, separate functions and mixins scss...

assets/styles/trumps/_helpers.scss

@@ -0,0 +1,60 @@
+// ==========================================================================
+// Helpers
+// ==========================================================================
+.u-vertical-center {
+	@include vertical-center;
+}
+
+.u-clearfix {
+	@include clearfix;
+}
+
+/*
+ * Hide visually and from screen readers:
+ * http://juicystudio.com/article/screen-readers-display-none.php
+ */
+
+.u-hidden {
+	display: none !important;
+	visibility: hidden;
+}
+
+/*
+ * Hide only visually, but have it available for screen readers:
+ * http://snook.ca/archives/html_and_css/hiding-content-for-accessibility
+ */
+
+.u-visuallyhidden {
+	position: absolute;
+	overflow: hidden;
+	clip: rect(0 0 0 0);
+	margin: -1px;
+	padding: 0;
+	width: 1px;
+	height: 1px;
+	border: 0;
+}
+
+/*
+ * Extends the .visuallyhidden class to allow the element
+ * to be focusable when navigated to via the keyboard:
+ * https://www.drupal.org/node/897638
+ */
+
+.u-visuallyhidden.focusable:active,
+.u-visuallyhidden.focusable:focus {
+	position: static;
+	overflow: visible;
+	clip: auto;
+	margin: 0;
+	width: auto;
+	height: auto;
+}
+
+/*
+ * Hide visually and from screen readers, but maintain layout
+ */
+
+.u-invisible {
+	visibility: hidden;
+}