Port FlatBuffers to Go.

Implement code generation and runtime library for Go, derived from the
Java implementation. Additionally, the test suite verifies:

 - the exact bytes in the Builder buffer during object construction,
 - vtable deduplication, and
 - table construction, via a fuzzer derived from the C++ implementation.

Change-Id: Ib95a019c684891def2b50281e570b4843fea7baa

CMakeLists.txt

@@ -12,6 +12,7 @@ set(FlatBuffers_Compiler_SRCS
   src/idl_parser.cpp
   src/idl_gen_cpp.cpp
   src/idl_gen_java.cpp
+  src/idl_gen_go.cpp
   src/idl_gen_text.cpp
   src/flatc.cpp
 )