v2015.12.14.01

Release

test_rule_timeout_ms was added for go_test and d_test, sh_test.
Fixed a bug where unhandled exceptions on background threads would result in a deadlock.
buckd reliability improvements
buck run has been documented: https://buckbuild.com/command/run.html
An issue causing buck publish to not work was fixed by @davido on GitHub.
Buck now reports the target that failed when buck project fails.
Buck can now parse build files in parallel if you pass --config project.parallel_parsing=true on the command line. We expect to make this the default soon, but for now it is considered experimental. https://buckbuild.com/concept/buckconfig.html#project
@LegNeato on GitHub added support for setting read and write HTTP headers when Buck talks to the HTTP cache. https://buckbuild.com/concept/buckconfig.html#cache