rewrote frontpage in md; adjusted other pages to hacker school
minor
modified login flow to use hs captcha; forget about activating accounts
smaller buffer, pauses after generate_matchup
 added fieldspec because i think there used to be fewer columns? .. fixed  crash
just 4 randombots
tweaked to download a 32bit version of D, don't download golang or node
natty is old now; node is on apt-get now
made data specific to hackerschool
fixed bug where no matches generate when the only potential seed players have rank NULL
ignores