Update Gruntfile

Add camera.js to utils
Update index.html

Bump src/camera.js to dist/utils.js
Update package.json

Add grunt-contrib-uglify 0.3.2
Update Gruntfile

Add uglify task
Add minify main.js
Add minify utils.js
Update index.html

use .min in main and utils.js
Update styles.less

adjust height of map_canvas
v0.0.81