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/extern/task/task.py

@@ -68,7 +68,7 @@ def _getExceptionMessage(exception, frame=-1, filename=None):
         % locals()
 
 
-class LogStub(object):
+class LogStub:
     """
     I am a stub for a log interface.
     """
@@ -243,7 +243,7 @@ class Task(LogStub):
 
 
 # FIXME: should this become a real interface, like in zope ?
-class ITaskListener(object):
+class ITaskListener:
     """
     I am an interface for objects listening to tasks.
     """