Brett Morgen is a brilliant documentarian as seen in Jane and Kurt Cobain: Montage of Heck – the latter being one of the best movies ever made about a musician.  His latest endeavour Moonage Daydream, a documentary about enigmatic artist David Bowie, is cut from the same cloth as Montage of Heck but, this time, it’s billed as more of a “cinematic experience”.  And, it appears that most of the production’s focus has been applied…