General push forward with more content (interactive elements)

- added list for deprecated packages
- removed deprecated node packages
- reactivated gulp vendor task
- work on intro page
- redefined interactive styles
- better variables in config

package.json

@@ -22,25 +22,19 @@
     "gulp": "^3.9.1",
     "gulp-autoprefixer": "^4.1.0",
     "gulp-cached": "^1.1.1",
-    "gulp-changed": "^3.2.0",
     "gulp-concat": "^2.6.1",
-    "gulp-cssnano": "^2.1.3",
     "gulp-data": "^1.3.1",
     "gulp-if": "^2.0.2",
     "gulp-jscs": "^4.1.0",
     "gulp-jshint": "^2.1.0",
-    "gulp-newer": "^1.4.0",
     "gulp-notify": "^3.2.0",
     "gulp-nunjucks-render": "^2.2.2",
     "gulp-plumber": "^1.2.0",
     "gulp-remember": "^0.3.1",
-    "gulp-rename": "^1.2.3",
-    "gulp-ruby-sass": "^2.1.1",
     "gulp-sass": "^4.0.1",
     "gulp-sass-lint": "^1.4.0",
     "gulp-sourcemaps": "^2.6.4",
     "gulp-uglify": "^3.0.0",
-    "gulp-useref": "^3.1.5",
     "gulp.spritesmith": "^6.9.0",
     "jshint": "^2.9.5",
     "jshint-stylish": "^2.2.1",