Gwen JG build guide for patch 14.19

Hi i'm a master Gwen player. this is my first guide, i am very new to this, but i am debating with myself on if to make more guides or not.
If you want to see the build in action, then i stream at. alexb0ba on twitch.
it's low quality but it goes through it.
here are some timestamps
quickly explained Build 19:10
Runes at 23:10