Updated LICENSE following merge of PR cameron314#228

Author: cameron314

LICENSE.md

@@ -1,6 +1,7 @@
 This license file applies to everything in this repository except that which
 is explicitly annotated as being written by other authors, i.e. the Boost
 queue (included in the benchmarks for comparison), Intel's TBB library (ditto),
+dlib::pipe (ditto),
 the CDSChecker tool (used for verification), the Relacy model checker (ditto),
 and Jeff Preshing's semaphore implementation (used in the blocking queue) which
 has a zlib license (embedded in lightweightsempahore.h).