cleanup: uniformly include "folly/*" using angle brackets

Summary: ... to placate cpplint. Via:

  git grep -l folly -- hphp/ | xargs sed -i 's|#include "folly/\([^"]*\)"|#include <folly/\1>|'

Reviewed By: @jdelong

Differential Revision: D1696778

Signature: t1:1696778:1416550426:4aae80a7b8604401a050a3bdddeb030e3e3d9b79
Update NEWS for "Yelawolf" release.

Summary: Update NEWS for "Yelawolf" release.

Reviewed By: @alexmalyshev

Differential Revision: D1701570

Signature: t1:1701570:1416869004:abaa922ec8cf1917d36486a7e9f4ff257e9e3e6f