Make the Jasmine-Version to be used configurable

As addressed by this jasmine-issue #303 (https://github.com/pivotal/jasmine/issues/303) the html-reporter in jasmine-1.3.0-standalone had an issue which lead to exceptions in IE 7/8. this was fixed in jasmine-1.3.1-standalone.

I thought about just updating the used version to 1.3.1, but i think it would be a better solution when someone could choose via an option which jasmine version he would like to use.

i added the jasmine-versions standalone which i downloaded from here: https://github.com/pivotal/jasmine/downloads

i also made the "version"-option available and updated the README.md