First pass at generating XML documentation from .proto comments.
This could be tidied up significantly, and at some point we will want to parse the markdown and generate more appropriate XML - but this is definitely better than nothing.
Generated code changes coming in next commit.
diff --git a/src/Makefile.am b/src/Makefile.am
index caae293..2985b5d 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -434,6 +434,8 @@
google/protobuf/compiler/objectivec/objectivec_primitive_field.h \
google/protobuf/compiler/python/python_generator.cc \
google/protobuf/compiler/ruby/ruby_generator.cc \
+ google/protobuf/compiler/csharp/csharp_doc_comment.cc \
+ google/protobuf/compiler/csharp/csharp_doc_comment.h \
google/protobuf/compiler/csharp/csharp_enum.cc \
google/protobuf/compiler/csharp/csharp_enum.h \
google/protobuf/compiler/csharp/csharp_enum_field.cc \
