Make fixes, improvements, and chibicc python bindings

- python now mixes audio 10x faster
- python octal notation is restored
- chibicc now builds code 3x faster
- chibicc now has help documentation
- chibicc can now generate basic python bindings
- linenoise now supports some paredit-like features

See #141

third_party/python/Lib/test/test_class.py

@@ -490,6 +490,7 @@ class ClassTests(unittest.TestCase):
 
         self.assertRaises(TypeError, hash, C2())
 
+    @unittest.skipIf(cosmo.MODE == 'tiny', "no stack awareness in tiny mode")
     def testSFBug532646(self):
         # Test for SF bug 532646