Add task to inject JS in index.html
Injector CSS

Rename tasks script, style
New task to inject all styles in index.sass/less/styl
Add tag injector in style files and fix test
Fix tasks deps

Too many tasks write in parallel in index.html
Randomly create a empty file
Use default starttag
Return size of dist/ folder after build

* Replace double quote by single
* Add / at end on gulp.dest()
Merge pull request #149 from eleven-labs/inject-css-js

Auto inject js, css in index.html