Merge extension module

There were `_packer.so` and `_unpacker.so`.
But single module is simpler than double module.

Merge extension module into single `_msgpack.so`.

Makefile

@@ -4,7 +4,7 @@ all: cython
 
 .PHONY: cython
 cython:
-	cython --cplus msgpack/*.pyx
+	cython --cplus msgpack/_msgpack.pyx
 
 .PHONY: test
 test:
@@ -18,8 +18,7 @@ serve-doc: all
 .PHONY: clean
 clean:
 	rm -rf build
-	rm -f msgpack/_packer.cpp
-	rm -f msgpack/_unpacker.cpp
+	rm -f msgpack/_msgpack.cpp
 	rm -rf msgpack/__pycache__
 	rm -rf test/__pycache__
 

msgpack/__init__.py

@@ -22,8 +22,7 @@ if os.environ.get('MSGPACK_PUREPYTHON'):
     from msgpack.fallback import Packer, unpackb, Unpacker
 else:
     try:
-        from msgpack._packer import Packer
-        from msgpack._unpacker import unpackb, Unpacker
+        from msgpack._msgpack import Packer, unpackb, Unpacker
     except ImportError:
         from msgpack.fallback import Packer, unpackb, Unpacker
 

msgpack/_msgpack.pyx

@@ -0,0 +1,4 @@
+# coding: utf-8
+#cython: embedsignature=True, c_string_encoding=ascii
+include "_packer.pyx"
+include "_unpacker.pyx"

setup.py

@@ -68,8 +68,7 @@ if len(version) > 3 and version[3] != 'final':
 if have_cython:
     class Sdist(sdist):
         def __init__(self, *args, **kwargs):
-            for src in glob('msgpack/*.pyx'):
-                cythonize(src)
+            cythonize('msgpack/_msgpack.pyx')
             sdist.__init__(self, *args, **kwargs)
 else:
     Sdist = sdist
@@ -85,14 +84,8 @@ else:
 
 ext_modules = []
 if not hasattr(sys, 'pypy_version_info'):
-    ext_modules.append(Extension('msgpack._packer',
-                                 sources=['msgpack/_packer.cpp'],
-                                 libraries=libraries,
-                                 include_dirs=['.'],
-                                 define_macros=macros,
-                                 ))
-    ext_modules.append(Extension('msgpack._unpacker',
-                                 sources=['msgpack/_unpacker.cpp'],
+    ext_modules.append(Extension('msgpack._msgpack',
+                                 sources=['msgpack/_msgpack.cpp'],
                                  libraries=libraries,
                                  include_dirs=['.'],
                                  define_macros=macros,