Can we make DirectoryTestSuite.getTests() public?

So I [made this thing](https://github.com/atuttle/mxunit-watch#mxunit-watch) that I think is pretty cool:

![](https://f.cloud.github.com/assets/46990/1242419/fe2a6fd2-2a3f-11e3-85c0-432200d85c67.png)

Only problem is that to make it I had to modify my MXUnit install and make 1 tiny change -- the one included in this pull request.

It simply makes the `getTests` method of the `mxunit.runner.DirectoryTestSuite` class public instead of private. This is done so that I can [get a list of the test suites and their associated tests in a very machine-usable format](https://github.com/atuttle/mxunit-watch#add-a-cfm-file-to-your-project).

I can't think of any harm that could come from changing the access level of this method; other than it would become part of the officially supported API of the framework and that might come with some maintenance concerns?

If you accept this pull request, then I can remove the pre-requisite of modifying your mxunit install in order to use mxunit-watcher. What do you say? :)