upgrade python protobuf version

Author: gangliao

paddle/api/CMakeLists.txt

@@ -67,11 +67,11 @@ SWIG_LINK_LIBRARIES(swig_paddle
     paddle_trainer_lib
     paddle_network
     paddle_proto
-    ARCHIVE_START
+    ${ARCHIVE_START}
     paddle_gserver
     paddle_function
     ${METRIC_LIBS}
-    ARCHIVE_END
+    ${ARCHIVE_END}
 )
 
 add_custom_command(OUTPUT ${PROJ_ROOT}/paddle/dist/.timestamp

paddle/setup.py.in

@@ -22,6 +22,8 @@ setup(name="py_paddle",
       package_data={'py_paddle':['*.py','_swig_paddle.so']},
       install_requires = [
         'numpy>=1.8.0',      # The numpy is required.
-        'protobuf>=2.4.1'    # The paddle protobuf version
+        'protobuf>=3.0.0'    # The paddle protobuf version
       ],
+      url='http://www.paddlepaddle.org/',
+      license='Apache 2.0',
 )