Gulp factoring

- Moved tasks into separate files
- Moved all configuration into gulp/config.js

src/Umbraco.Web.UI.Client/gulp/util/processLess.js

@@ -0,0 +1,26 @@
+
+var config = require('../config');
+var gulp = require('gulp');
+
+var postcss = require('gulp-postcss');
+var less = require('gulp-less');
+var autoprefixer = require('autoprefixer');
+var cssnano = require('cssnano');
+var cleanCss = require("gulp-clean-css");
+var rename = require('gulp-rename');
+
+module.exports = function(files, out) {
+    var processors = [
+        autoprefixer,
+        cssnano({zindex: false})
+    ];
+
+    return gulp.src(files)
+        .pipe(less())
+        .pipe(cleanCss())
+        .pipe(postcss(processors))
+        .pipe(rename(out))
+        .pipe(gulp.dest(config.root + config.targets.css));
+
+    console.log(out + " compiled");
+}