{
    "devDependencies": {
        "gulp": "^3.8.1",
        "gulp-autoprefixer": "0.0.7",
        "gulp-csscomb": "^0.1.0",
        "gulp-imagemin": "^0.6.1",
        "gulp-minify-css": "^0.3.5",
        "gulp-notify": "^1.3.1",
        "gulp-recess": "^0.3.1",
        "gulp-soften": "0.0.1"
    }
}

{
  "devDependencies": {
    "gulp": "^3.8.1",
    "gulp-autoprefixer": "0.0.7",
    "gulp-cssbeautify": "^0.1.3",
    "gulp-csscomb": "^0.1.0",
    "gulp-imagemin": "^0.6.1",
    "gulp-minify-css": "^0.3.5",
    "gulp-notify": "^1.3.1",
    "gulp-recess": "^0.3.1",
    "gulp-soften": "0.0.1",
    "imagemin-pngcrush": "^0.1.0"
  }
}

Add pngcrush to dev dependencies
Add pngcrush to dev dependencies

trying to get the imagemin working
