Improve the tests and the supported platforms

Pull request changelog
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**v0.0.3**
 * Make library "Node friendly"
 * Add testing in the browser environment
 * Define supported platforms: Node.js 0.10+, IE 9+, Chrome 7+, FireFox 4+, Opera 20+
 * Add Changelog.md file

**v0.0.2**
 * Add tests for the JSRutils.Utility
 * Add native Array.prototype.filter and String.prototype.trim usage in the JSRutils.Utility
 * Improve the tests and format it's code.