Adds a build script and updates to 1.3.1

This uses Grunt to build the completed scripts. It automates the upgrade process allowing jasmine to be updated to any version.

The `package.json` uses it's own version which I've established the following versioning scheme: `x.y.z-build-w` where `x.y.z` is the jasmine version in use and `w` is a single digit incremented for each increase of the jasmine-all project.

The following tasks are available:

- `grunt build` - builds `build/jasmine-all.js` and `build/jasmine-all-min.js`
- `grunt gh-pages` - Adds the build files to gh-pages and pushes them. (and all grunt-gh-pages tasks)
- `grunt clean` - removes the `build` directory