added python package setup, so package can be installed

setup.py

+#!/usr/bin/env python
+
+from distutils.core import setup, Extension
+from os.path import dirname
+import os
+import sys
+import shutil
+import fnmatch
+import numpy
+import site
+
+
+def find_package_names (basedir='lib'):
+    matches = []
+    for path in (path for path, sub, files in os.walk(basedir) if '__init__.py' in files):
+        components = path.split('/')
+        name = '.'.join(components[1:])
+        matches.append (name)
+    return matches
+
+
+def find_package_mapping (basedir='lib'):
+    mapping = {}
+    for path in (path for path, sub, files in os.walk(basedir) if '__init__.py' in files):
+        components = path.split('/')
+        name = '.'.join(components[1:])
+        mapping[name] = path
+    return mapping
+
+
+
+# now do main setup
+setup(name='gcforest',
+      version = '1.1',
+      description = 'gcForest implementation',
+      author = 'Zhi-Hua Zhou ',
+      author_email = 'zhouzh@lamda.nju.edu.cn',
+      packages = find_package_names(),
+      package_dir = find_package_mapping(),
+      ext_modules = [])
+
+