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

modules/_vendor.scss

@@ -1,23 +0,0 @@
-/**
- * @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};
-}
-