Features/glob 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. I've tested the code on Linux and Windows.

The build also passes on [CircleCI](https://circleci.com/gh/stbutler11/jasmine-junit-runner/7)