Add Javascript and Lua links.
Extend FlatArrayMessageReader to indicate where the message actually ended, in case it was not the end of the array.  Useful when reading an mmap'd file with a Cap'n Proto prefix.  Also fix a bug in Maybe dealing with DisallowConstCopy subclasses.
Work around lack of __thread on iOS.  Based on patch from Jason Choy (@jjwchoy).
Update test configs
Blog post about 0.4.1.
Make it possible for a message builder to incorporate a byte array not owned by it without copying.  Useful for injecting large data blobs into a message without copying their contents.  Access this functionality through the Orphanage interface.
Extra test line I should have included.
Add AutoCloseFd::operator=
Apparently writev() imposes a limit on the vector size.  Work around that.  Not sure why libc doesn't already do this.
Fix 32-bit build.
Fix doc typos.
Add missing include for OSX.