Basic Grunt tasks and Minor CSS improvements

[abpetkov]

Hi. I like your plugin very much and decided to do few changes to make the dev process better.

• I added Grunt tasks. Run npm install (with Node.js installed) to install dependencies. Then running grunt or grunt build will generate minified JS and CSS files into the min/ directory using src/ directory as a source.
• In your main CSS file I changed the padding property for .jq-ry-container to use more shorthand syntax. Also you don't need to specify px or % units for zero values.
• Fixed a small typo in the Readme

Some advices:

• You might want to publish this in Bower. It will help you popularize your project at least a little.
• Check out Semver and use it for versioning your project. It's a good and popular practice and will be appreciated.

Cheers.

[prrashi]

@abpetkov Thanks a lot :), i shall update in bower too.