Merge pull request #29 from ifduyue/__version__

Also add __version__.

Author: steeve

README.rst

@@ -27,15 +27,17 @@ The library is pretty simple to use::
     True
     >>>
 
-Methods
-=======
+Methods and Constants
+=====================
 The bindings provides some aliases too::
 
     >>> import lz4
     >>> lz4.LZ4_compress == lz4.compress == lz4.dumps
     True
     >>> lz4.LZ4_uncompress == lz4.uncompress == z4.decompress == lz4.loads
     True
+    >>> lz4.VERSION == lz4.__version__  # e.g. "0.7.0"
+    True
     >>>
 
 Is it fast ?

src/python-lz4.c

@@ -203,6 +203,7 @@ void initlz4(void)
     }
 
     PyModule_AddStringConstant(module, "VERSION", VERSION);
+    PyModule_AddStringConstant(module, "__version__", VERSION);
     PyModule_AddStringConstant(module, "LZ4_VERSION", LZ4_VERSION);
 
 #if PY_MAJOR_VERSION >= 3