Address errors, improvements, formatting

- Removed unused code not portable due to buffer() use
- raw_input() does not exist in Python 3
- Fixed octal constant syntax for Python 3
- Fixed TypeError
- Replace if not exists: makedirs(path) with single call: using makedirs(path, exist_ok=True)
- Class inherits from object, can be safely removed from bases in python3: pylint's useless-object-inheritance (W0235) check

Signed-off-by: JoeLametta <JoeLametta@users.noreply.github.com>

whipper/program/cdparanoia.py

@@ -452,7 +452,7 @@ class ReadVerifyTrackTask(task.MultiSeparateTask):
             logger.debug('read and verify with taglist %r', taglist)
         # FIXME: choose a dir on the same disk/dir as the final path
         fd, tmppath = tempfile.mkstemp(suffix='.whipper.wav')
-        os.fchmod(fd, 0644)
+        os.fchmod(fd, 0o644)
         os.close(fd)
         self._tmpwavpath = tmppath