Make save_to_file use correct mode (Fixes #141)

Author: jansel

opentuner/search/manipulator.py

@@ -93,11 +93,11 @@ def _get_serializer(self, filename, format=None):
             serializer = self.FILE_FORMATS[format]
         return serializer
 
-    def save_to_file(self, cfg, filename, format=None):
+    def save_to_file(self, cfg, filename, format=None, mode="w"):
         """
         Write cfg to filename.  Guess the format by extension if one is not given.
         """
-        with open(filename, 'wb') as fd:
+        with open(filename, mode) as fd:
             self._get_serializer(filename, format).dump(cfg, fd)
 
     def load_from_file(self, filename, format=None):

setup.py

@@ -21,7 +21,7 @@
 
 setup(
     name='opentuner',
-    version='0.8.6',
+    version='0.8.7',
     url='http://opentuner.org/',
     license='MIT',
     author='Jason Ansel',