Update gulpfile

Author: mgechev

gulpfile.js

@@ -2,11 +2,11 @@
 
 'use strict';
 
-var gulp = require('gulp'),
-    markdownpdf = require('gulp-markdown-pdf');
+var gulp = require('gulp');
+var shell = require('gulp-shell');
 
-gulp.task('default', function () {
-  return gulp.src('README.md')
-    .pipe(markdownpdf())
-    .pipe(gulp.dest('build'));
-});
+gulp.task('default', shell.task([
+  'mkdir temp && cp -r ./README.md ./images/* temp',
+  './node_modules/.bin/generate-md --layout minko-book --input ./temp --output ../angularjs-in-patterns-gh-pages',
+  'rm -rf temp'
+]));