Allow option to select layouts

[ceonelson]

I just discovered all these new layouts last night and your awesome site! I am interested in trying them out to see which I find more comfortable and am fastest at.

However, that's a bit difficult when the layouts used in a battle are random.

My idea would be to allow someone to select the two layouts to use for an unranked battle so they can find out which layouts they like best :)

[jgarvin]

idea: still randomize which layout is first/second so user is still sorta blinded

[malfple]

Currently, who goes first or second is already randomized, and it is randomized for each word pair. You can observe after you finish a battle, the first word you see may be the second word in the battle report.