Apple versus Microsoft. Jobs versus Gates. A battle for the ages. A musical crammed full of comedy, rivalry and a number of great songs.   The creation of ‘Nerds’ has been a lengthy process, but now running at the Edinburgh Fringe, I can state that the work has been worth it as this new musical shines, boasting a cast featuring west end names, a quirky and comical tale of truth mixed with a fair dose of imagination, and songs that will have you beaming from ear to ear.   Stev