Added Grunt task for minification.
Added Grunt minification task.
Updated README.
Merge remote-tracking branch 'origin/add-minification-task' into add-minification-task

Conflicts:
	Gruntfile.js
Merge pull request #1 from keta/add-minification-task

Added minified script file and Grunt minification task
Added minified script file.
Fixed code blocks in README.