Open the cache in binary mode.

This fixes an issue where the cache fails to load on Windows machines.
EOL characters were getting modified, causing zlib uncompression to fail.

[hoxu@users.sf.net: slightly modified the commit message]

Signed-off-by: Heikki Hokkanen <hoxu@users.sf.net>

gitstats

 		if not os.path.exists(cachefile):
 			return
 		print 'Loading cache...'
-		f = open(cachefile)
+		f = open(cachefile, 'rb')
 		try:
 			self.cache = pickle.loads(zlib.decompress(f.read()))
 		except:
 	# Save cacheable data
 	def saveCache(self, cachefile):
 		print 'Saving cache...'
-		f = open(cachefile, 'w')
+		f = open(cachefile, 'wb')
 		#pickle.dump(self.cache, f)
 		data = zlib.compress(pickle.dumps(self.cache))
 		f.write(data)