Add setup.py (#4)

This will support Windows properly and allow conda-tree to be
added to conda-forge.

meta.yaml

@@ -1,25 +1,29 @@
 package:
   name: conda-tree
-  version: "0.0.2"
+  version: "0.0.3"
 
 source:
   git_url: https://github.com/rvalieris/conda-tree.git
-  git_rev: v0.0.2
+  git_rev: v0.0.3
 
 requirements:
   host:
     - python
+    - pip
+    - setuptools
 
   run:
+    - python
     - networkx
     - conda
 
 build:
-  number: 1
+  number: 0
   noarch: generic
-  script:    # See https://github.com/conda/conda-build/issues/3166
-    - mkdir -p "$PREFIX/bin"
-    - cp conda-tree.py "$PREFIX/bin/conda-tree"
+  script:
+    - "{{ PYTHON }} -m pip install . --no-deps -vv"
+  entry_points:
+    - conda-tree = conda_tree:main
 
 test:
   commands:

setup.py

@@ -0,0 +1,17 @@
+#!/usr/bin/env python
+
+from setuptools import setup
+import shutil
+
+
+# we need to rename the script because it's not a valid module name
+shutil.copyfile('conda-tree.py', 'conda_tree.py')
+
+setup(name='conda-tree',
+      version='0.0.3',
+      description='conda dependency tree helper',
+      author='Renan Valieris',
+      url='https://github.com/rvalieris/conda-tree',
+      py_modules=['conda_tree'],
+      entry_points={
+        'console_scripts': ['conda-tree=conda_tree:main']})