Added in globbing for loading javascript files

This pull request is to allow users to use a glob in the filenames for specs and sources. For example a user could enter the following:

```
@JasmineSuite(specs = { "spec*.js" }, sources = { "subdir/*.js"}, sourcesRootDir = "src/test/javascript/sources/")
```

I'm happy to move the file loading code to another file or add in some extra tests that you would like.