Fixed issues generating version-dependent installer for Windows Python module

Passing the '--target-version' option to bdist_msi will generate an
installer that requires the right version of Python without distutils
needing to be able to find a working compiler.

interfaces/python/setup.py.in

@@ -17,8 +17,7 @@ if '@python_package@' == 'full':
           url="http://code.google.com/p/cantera",
           packages = ["","Cantera","Cantera.OneD",
                       "MixMaster","MixMaster.Units"],
-          package_data = {'Cantera': dataFiles},
-          ext_modules=[Extension('_spam', [@spam_source@])])
+          package_data = {'Cantera': dataFiles})
 
 elif '@python_package@' == 'minimal':
     setup(name="Cantera CTI File Processor",
@@ -28,5 +27,5 @@ elif '@python_package@' == 'minimal':
               """,
           author="Prof. D. G. Goodwin, Caltech",
           author_email="dgoodwin@caltech.edu",
-          url="http://www.cantera.org",
+          url="http://code.google.com/p/cantera",
           py_modules = ["ctml_writer"])

src/python/SConscript

@@ -85,16 +85,13 @@ else:
     # Install Python module in the default location
     extra = ''
 
-if 'MSSdk' in os.environ:
-    localenv['ENV']['DISTUTILS_USE_SDK'] = '1'
-    localenv['ENV']['MSSdk'] = os.environ['MSSdk']
-
 if localenv['PYTHON_INSTALLER'] == 'direct':
     install(localenv.Command, 'dummy', pymodule,
                                 'cd %s && $python_cmd setup.py install %s' % (moddir,extra))
 elif localenv['PYTHON_INSTALLER'] == 'binary':
     install(localenv.Command, 'dummy', pymodule,
-            'cd %s && $python_cmd setup.py bdist_msi --dist-dir=../..' % moddir)
+            'cd %s && $python_cmd setup.py bdist_msi --dist-dir=../..' % moddir +
+            ' --target-version=' + distutils.sysconfig.get_python_version())
 
 if localenv['python_package'] == 'full':
     install(localenv.RecursiveInstall, pjoin('$inst_sampledir', 'python'),

src/python/spam.c

@@ -1,13 +0,0 @@
-/*
- * A trivial Python extension module introduced to force distutils to
- * generate installation packages requiring a specific Python version.
- */
-
-#include <Python.h>
-
-PyMODINIT_FUNC
-init_spam(void)
-{
-    Py_InitModule3("_spam", NULL,
-                   "Spam, spam, spam, eggs, and spam.");
-}