By: Addison Wylie Tig is refreshingly sensible.  Then again, I guess that’s what happens when skilled documentarians Kristina Goolsby and Ashley York chronicle the ups and downs of a naturally funny and practical comedian. Tig Notaro worked very hard to earn stand-up credibility.  Once her career found momentum, her dry wit opened the door for more opportunities.  On the set of Lake Bell’s indie sleeper In A World…, Notaro found herself in weak health.  Little did…