courier-0.1.0.7: changes.md

0.1.0.6

 * Added simple implementation of transport for UDP
 * Verified build & unit tests on Linux Ubuntu 13.10 with GHC 7.6.3
 * Verified build & unit tests on pre-release GHC 7.8 on FP Complete's platform
 * Mac OS X 10.9 is unreliable for unit tests, do to non-deterministic socket bind failures