fixed Gruntfile.js 

- SASS was stuck in a compilation loop because the entire folder was being watched. When a `.sass` file is changed, the watch task is triggered. But at the same time, the source map is changed, which also triggers the watch task, and so compilation just keeps on happening, because files keep changing. I changed it so Grunt only watches `.sass` files and not the source map file.

- Jade was not being compiled, because Grunt was watching the `html` folder which is empty. I just had to change the paths. So `index.jade` and the `jade-includes` files are being watched. 

livereload should be happening.