Use only index tree in demo/ path

add a blank index.html
Update package.json

add grunt-contrib-connect@0.7.1 in devDependencies
Update Gruntfile.js

add serve task with connect and watch
Update Gruntfile.js

fix watch:html task add path.demo
Update Gruntfile.js

add snap.svg in concat:plugins task
Update bower.json

add svgLoader@1.0.0 in dependencies
Update Gruntfile.js

add svgLoader.js in concat:plugins task