Re-introduce java packages and add bash scripts for Golden Master testing

Java packages are back
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I found that when I was doing the kata in java, I wanted to pull out some of the classes I'd extracted into their own package.  This was not possible because some of the original classes were in the default package, and a class in a package can't import from the default package (not in Eclipse, anyway).  When I'd worked on this kata in the past, the source code started in the `com.gildedrose` package.  I've re-introduced this package and moved the classes to it.  I've also updated the test reference in `config.gr` to match.

New bash scripts for Golden Master testing
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I've had trouble installing the TextTest tool on a variety of platforms (win64 and machos 10.5 didn't play for me) and wanted a fall-back mechanism for running the Golden Master tests in the dojo.  I've added a new directory, `golden-master-scripts` with 2 simple bash scripts to do the job.  The README in the directory should explain their use.