Initial happstack stuff.

Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>
Pong

Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>
Actually, we don't need two version.

Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>
Gin up

Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>
More READMe

Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>
Merge branch 'master' of github.com:ezyang/pldi14-rlimits-aec