explicit match NULL here, not a catch-all
Merge pull request #195 from mirleft/minor

explicit match NULL here, not a catch-all
include the FLOW interface
fix example
we need mirage-dev here atm
lets use opam1.2
opam1.2 fixes
Merge pull request #196 from mirleft/mirage-fixes

mergggge!
x += 17 - 17
Merge pull request #197 from mirleft/mergggge

x += 17 - 17
mirage: writes can properly fail
mirage: write can fail even more

Tricky bit: if write caused an error, we have to make sure the state is `Active
before saving the error and hanging up, lest we clobber someone else's error
that happened in the meantime.

This means the flow cell needs to be re-read.
mirage: check reactive writes too
build mirage examples
only change directory once
connect to slashdot, they close connection when Connection: close is sent by client
Merge pull request #199 from mirleft/build-mirage

build mirage examples
engine: clearly denote absence of response
fix front-ends
Merge pull request #198 from mirleft/new-flow

mirage: write results -- thanks! :D