Move demo/ path

fix #40
Update Gruntfile.js

bump demo path
Update Gruntfile.js

rm path.demo of bump task
Update Gruntfile.js

rm demoCss and demoPlugins of copy task
Update package.json

rm grunt-contrib-connect
Update Gruntfile.js

rm connect task fix #41
Update package.json

rm grunt-contrib-watch
Update Gruntfile.js

rm watch task fix #42
Update Gruntfile.js

increase registerTask, use test -> watch
0.0.67