adds code of conduct

CONDUCT.md

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+# 飲茶 Code of Conduct
+
+> TL;DR - Be excellent to each other
+
+This document extends the generally accepted social contract of being a human
+being and in particular one having lunch with strangers; be nice.
+
+##### Supplementary
+
+###### Lunchtime
+
+Dim Sum is traditionally a morning/lunchtime food so DimSumJS is intended to
+occur during your lunch break. This occasionally means people have to rush
+back to the office so if you arrive late, you may still be eating when the bill
+arrives.
+
+###### Ordering and eating
+
+Dim sum is a social meal so sharing food is absolutely encouraged. Be
+adventurous in your ordering, pass food around and try a little bit of
+everything on the table.
+
+###### Tea
+
+Tea is a central part of the dim sum experience. When pouring tea, grasp the
+teapot with your right hand and offer to others before filling your own cup,
+starting with the person on your left.
+
+If receiving tea, thank the pourer by tapping your fingers on the table.
+[Tradition](http://en.wikipedia.org/wiki/Dim_sum#Etiquette) says to use your
+index finger if single or index and middle fingers if married or if it's none
+of anyone's damn business.
+
+When the teapot is empty, turn the lid upside down and/or leave it on the side
+of the pot, this signals to the waiting staff that it should be refilled.
+
+###### Dessert
+
+Don't feel the need to wait until the end of the meal to order sweet dim sum.
+It's normal to order and eat 'dessert' dim sum alongside the savoury stuff.