gulp and file structure overhaul

new gulp setup
including new npm packages
new file structure
moved all development files to source/
used files are in build/ now

source/style/modules/_vendor.scss

@@ -0,0 +1,23 @@
+/**
+ * @description
+ * Generates cross-browser-compatible output for a given element with its value.
+ *
+ * @author sthag
+ *
+ * @param values
+ * @returns
+ *   -webkit-<name>: <values>
+ *       ...-<name>: <values>
+ *
+ * @example
+ *   .selector
+ *     @include vendor-prefix(hyphens, auto)
+ */
+@mixin vendor-prefix($name, $argument) {
+	-webkit-#{$name}: #{$argument};
+	-ms-#{$name}: #{$argument};
+	-moz-#{$name}: #{$argument};
+	-o-#{$name}: #{$argument};
+	#{$name}: #{$argument};
+}
+