fix build with recent versions of cocaine-core
Actual app runner. Needs --config option to be passed to worker
Client can produce StreamHandle -- tcp_wrap shim that can be used as
a ._handle in node Socket
add callback method definitions
catch socket error in Client and Worker
remove unneeded metachunk parsing shim
allow 0.8-0.11.3 node versions
session can be destroyed
add .ref and .unref method shims to low-level worker object. to be
used from handle.ref and handle.unref
version bump