The no menu for me, please edition

The Menu key to the left of the left arrow key would put a weird
symbol, `�`, into the textarea, so I removed it.

http://123.57.250.164:3000/tada68#A86DC13F8C670AD9684521480830D94D

The time traveller edition

It's an improvement on 2016-10-05. Some of the keys from layer 1 are
removed. The down arrow key on layer 1 acts as a stop button now.

http://123.57.250.164:3000/tada68#1F035786371BD502101734C23009DE83

Experimenting with the arrow keys on jkl;

http://123.57.250.164:3000/tada68#4C25E4F6F27F87ED21462AE2459FAE75

Baby's first keyboard layout.

The original layout of TADA68.