message: Added gulp devDependencies
diff: "description": "JavaScript framework that creates PowerPoint (pptx) presentations",
  "homepage": "https://gitbrent.github.io/PptxGenJS/",
  "license": "MIT",
  + "main": "dist/pptxgen.js",
  "dependencies": {
  "jquery-node": ">=0.2.0",
  "jszip": ">=3.1.2",
  "image-size": ">=0.5.1"
  },
  - "main": "dist/pptxgen.js",
  + "devDependencies": {
  + "gulp": "^3.9.1",
  + "gulp-concat": "^2.6.1",
  + "gulp-ignore": "^2.0.2",
  + "gulp-sourcemaps": "^2.6.0",
  + "gulp-uglify": "^3.0.0"
  + },
  "directories": {
  "example": "examples",
  "libs": "dist"
  