add setup_nbt.py and setupnbt64.bat. try to import _nbt without using ImportError, in case it was built using setup_nbt.py

nbt.py

@@ -1,8 +1,13 @@
 try:
     import os
-    os.environ['DISTUTILS_USE_SDK'] = "1"
-    from pyximport import install; install()
-    from _nbt import *
+    try:
+        import _nbt
+        from _nbt import *
+    except ImportError:
+        print "Import error loading precompiled _nbt extension. Trying pyximport..."
+        from pyximport import install; install()
+        import _nbt
+        from _nbt import *
 except ImportError, e:
     print "Import error loading _nbt extension", repr(e)
     import traceback; traceback.print_exc()

setup_nbt.py

@@ -0,0 +1,12 @@
+    
+from distutils.core import setup
+from distutils.extension import Extension
+from Cython.Distutils import build_ext
+
+ext_modules = [Extension("_nbt", ["_nbt.pyx"])]
+
+setup(
+  name = 'NBT library (Cython implementation)',
+  cmdclass = {'build_ext': build_ext},
+  ext_modules = ext_modules
+)

setupnbt64.bat

@@ -0,0 +1,6 @@
+call "C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\bin\vcvars64.bat"
+set DISTUTILS_USE_SDK=1
+set MSSdk=1
+c:\python26-64\python setup_nbt.py build_ext
+
+