Always show chat in Etherpad Lite

There is a new feature in Etherpad Lite that allows the chat to always be set to the school.

A user can change it by passing a parameter or you can set it at hte server level.

To set it at the server level edit /static/custom/pad.js

Add

chat.stickToScreen(true);

To the costumStart function.

Job done :) Hit f5 and admire your awesomeness.