Pull TextBlob out of capnpc-capnp and into KJ as kj::StringTree.  Use it in the stringification code to make that code cleaner and avoid using iostreams.
Update capnpc-capnp to use KJ_MAIN.
C++ code generator WIP.
Switch to the new compiler.  All tests pass\!  Need to submit bootstrap copies of the generated code used by the compiler itself.  These bootstrap copies are still built by the old compiler at the moment.
Fix automake to support bootstrapping the compiler.
Fix distcheck.
Add test to check that bootstrapped sources are up-to-date and a script for updating them.
Regenerate bootstrapped sources using C++ compiler.  YAY!
Improve bootstrap test.
Oops, memrchr is a GNU extension.
Missing include.
Remove old compiler from test script.
Remove obsolete Haskell-based compiler.
Go back to prefering -std=gnu++11, but detect the one known case where this breaks and we need to use -std=c++11.
Cygwin doesn't have backtrace().
Missing includes for Cygwin.
Fix exception-catching test to work on platforms that don't provide a stack trace.
Add Cygwin to test script.
Oops.
Remove old compiler from release script.