By: Addison Wylie I can easily sell you on Relative Happiness by describing Melissa Bergland’s dynamite performance.  She’s spunky and wise, manages an adorable Bed and Breakfast in Nova Scotia, and her sense of humour is quick-witted towards those who condescend her.  She takes the audience’s attention and commands the screen. I wish it was that easy to describe Deanne Foley’s lukewarm dramedy.  Mostly because of a deceptive bait-and-switch at the halfway hump which converts…