[dev branch] Cmake error

[hjk41]

Both Windows and Linux builds fail with cmake. (Of course you can use make on Linux, I just tried cmake on Linux to verify the problem.)

CMake Error at cmake/ProtoBuf.cmake:28 (message):
Error: pslite_protobuf_generate_cpp_py() called without any proto files
Call Stack (most recent call first):
CMakeLists.txt:23 (pslite_protobuf_generate_cpp_py)

I printed out the parameters:

proto_gen_folder=/home/hct/test/ps-lite/include prot_srcs= proto_hdrs=
proto_python= project_src_dir=/home/hct/test/ps-lite proto_files=

[mli]

oh, that is because i moved the .proto files from incude/ into src/. so now protobuf is only required to compile the .a file. any other programs using ps-lite do not necessary to aware the exists of protobuf. same for zmq.