rollover over the interface buttons now works as expected.
Also changed the width of the buttons to the correct size.
Resized the width and height of the sprites to be the same as the boxes we display
them in.
Layout of the unittests directory
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We've got a directory for tests - unittests/tests. Add your tests there. There should be only one file per functionality area tested (i.e - all the
tests about JSONSerializer should be in jsonserializer.js). Your tests should be wrapped in a function named "test_$filename$" where $filename$ is the
name of your file. Don't forget to define a module for your tests and to add a reference to your file in index.html