Update CHANGELOG and AUTHORS

AUTHORS

@@ -29,3 +29,10 @@ William A. Kennington III <wak@google.com>
 Guillaume Lager <g.lager@innoseis.com>
 Tobias Haegermarck <tobias.haegermarck@gmail.com>
 Justin DeMartino <jdemarti@gmail.com>
+Constantine Grantcharov <cgrantcharov@trustpointinnovation.com>
+Nick Ewalt <nicholasewalt@google.com>
+Harald Fernengel <harryf@gmx.com>
+Alice Wang <aw@squareup.com>
+Kevin Fitch <kfitch42@gmail.com>
+Kamal Marhubi <kamal@marhubi.com>
+

CHANGELOG.txt

+nanopb-0.3.9 (2017-09-xx)
+ Fix bugs in proto3 encoding of submessages (#256)
+ Fix message size calculation for arrays of size 1 (#253)
+ Fix segfault with FT_CALLBACK inside FT_POINTER (#259)
+ Properly detect truncated tags in corrupted messages (#277)
+ Make pb_decode_varint32 overflow checks exact (#258)
+ Add option to build without 64-bit support (#86)
+ Add options to define source and header file extensions (#264)
+ CMake: add dependency for .options file (#265)
+ CMake: change use of relative paths (#250,#271,#273)
+ Better error message for missing max_size option (#281)
+ Travis-CI build fixes (#283)
+ Add Bazel build system file (#266)
+
 nanopb-0.3.8 (2017-03-05)
  Fix problems with multiple oneofs in same message (#229)
  Zero-valued extension fields were mistakenly ignored by encoder (#242)